VELOGICAL RIM-DYNAMO - Standard Bicycle Dynamo - Smooth Running, Lightweight, Efficient

The elegant mini Rim-Dynamo by VELOGICAL is extremely smooth running lightweight - a high-end durable standard component for the use with LED lighting systems on bicycles. Modernly designed for year-round cyclists and sportive cyclists.

Configuration dynamo set

Select a dynamo version suitable for your range of use

Select a special bracket for your installation

More questions about the choice of the dynamo bracket?
E-Mail to team@velogical.eu kindly with photo of the bicycle

Rim-Dynamo sets samples / Dynamo Installations for Framebuilders

Versions and Applications

Select a Dynamo

”SPORT” model: red colour, for universal use from 10kph (6,2mph)

For minimal ride resistance and maximum speed.

“TREKKING” model: natural colour, for universal use from 8kph (5mph);
For low ride resistance and reserves of power when riding more slowly, for double headlight set-ups, for city riding speeds and for sportive use.

”SPECIAL” model: blue colour, for special use from 5kph (3mph)

Maximum power supply even at low speeds for special applications.

Hint: sold out
We replace the dynamo SPECIAL by the 3-PHASE GENERATOR bundled with the UNIVERSAL POWER SOURCE.
Product launch in late summer 2020.

We keep a waiting list with preorders.
Learn more

Distribution

Consumerprice

Direct Marketing in the EU: € 150,00 / including sales taxes, plus shipping/PP; out of the EU: € 126,05 plus local taxes, shipping/PP.

B2B prices
On request for dealers, workshops, manufactures
with official registration data.

Order information

You can order your VELOGICAL Dynamo on this website.

Contact Form, click here

Rim-Dynamo sets samples, click here

German certification

With german certification according StVZO

Technical data

Dynamo type: rim dynamo / new side-running concept /
Over-voltage protection with LED front lights: see light selection and recommendations.

Weight (Dynamo only): 52g

Weight (Dynamo with bracket): 70-90g

(depending on bracket type)

Efficiency at 30kph (18,6mph): more than 60%

Efficiency at over 30 kph (18,6mph): up to 75%

Electrical data: Speed dependent

(see table download from our website)

Slip resistance: defined contact pressure on rim flank (adjustable), rainproof lighting
Drive wheel with O-ring: UV light resistant, industrial quality

O-ring service interval: replace after 5000-7000km (3110-4350mi) of dynamo use (guideline from experience)

Service: Manufacturer VELOGICAL engineering GmbH

Warranty period: 2 years from the purchase date,
on production of the original receipt.

In the box

- 1 Special bracket, type selected when ordering:

Brake boss adapter left for brake boss fitting,

Left mounting or rear right mounting;

Brake boss adapter right for brake boss fitting,

Right mounting or rear left mounting;

Frame stay adaptor short 12/20mm Ø frame tube attachment;

Frame stay adaptor middle 20/32mm Ø frame tube attachment;

Frame stay adaptor long 32/46mm Ø frame tube attachment;

- 2 O-ring /drive wheel for fast riders

- 2 O-ring /drive wheel for normal riders

- 1 Thermistor

- 1 Set heat shrink tubing

- 1 User manual

- 1 Allen key 2mm Ø (hex key)

Side selection

Left mounting is standard for all versions

Right mounting available on request

(may affect delivery time)

All specifications are subject to technical change.

Simple Requirements for the VELOGICAL Dynamo

A rim with a braking surface or a rim with perpendicular flank

4mm or more. Technically and visually these are fully compatible with all types of hub and all types of brake.

Over-voltage protection built into the lamp with metal cooling surface or metal housing. Light installation with VELOGICAL thermsitor (overcurrent protection). The high efficiency of the VELOGICAL Dynamo necessitates over-voltage protection, which converts excessive electrical energy harmlessly into heat. In combination with the additional overvoltage protector
SHIMANO "SM-DH10A", additionally to the VELOGICAL thermistor every LED Bikelight can be used.

Suitable LED front lights (40 lux and more) are offered by, for example, manufacturers including SUPERNOVA, B+M(Busch+Müller), HERRMANS, TRELOCK or SON(Schmidt Maschinenbau).

When combined with VELOGICAL-approved LED cycle lights, the VELOGICAL Dynamo will demonstrate impressively just how much power lies within, delivering night-time illumination ideal for navigating unlit cycle routes even at high speed – and of course also for general safety purposes in traffic.

Installation Samples & Brackets click here

Rim-Dynamo Sets Samples (1 Dynamo + 1 Bracket) click here

Select a Special Bracket for the VELOGICAL Dynamo

More questions about the choice of the dynamo holder?
E-Mail to team@velogical.eu kindly with photo of the bicycle

Brake Boss Fitting

Brake boss adapter "left fitting"

Priority front wheel
!Center-center brake boss 80mm (current version since about 2000)

- Fitting on the left (front), or right (rear)
- For rim brake bosses on telescopic forks

- For rim brake bosses on rigid forks

- For rim brake bosses on rear stays

(current V-brakes, cantilever brakes / 80mm center-center b.boss)
- For framebuilders (+ additional custom part, seat stay installation)

- Frames made from aluminium, carbon, steel, titanium

- ANY frame tube shape
- Check barriers
Right side version only for installation with Magura hydraulic brakes
Reverse mounted brake bosses on front forks with 20 inch wheels
and smaller, pointing to the rear:
Please ask for a special adjustment (no additional costs),
Please look for potential conflicts with stays by fenders and racks
Space needed in front of V-brake arm standard 45mm
Space needed in front of V-brake arm with parallelogram 55mm

Brake boss adapter "right fitting"

Priority front wheel

!Center-center brake boss 80mm (current version since about 2000)

- Fitting on the right (front) or left (rear)

- For rim brakes as described above

- For Magura hydraulic rim brakes
- Check barriers
Reverse mounted brake bosses on front forks with 20 inch wheels
and smaller, pointing to the rear:
Please ask for a special adjustment (no additional costs),
Please look for potential conflicts with stays by fenders and racks
Space needed in front of V-brake arm standard 45mm
Space needed in front of V-brake arm with parallelogram 55mm

Frame Stay Fitting (on Straight Tubes Without Brake Bosses)

- !Provide the diameter of the tube at the location where the dynamo will be mounted (around 30mm below mid of the rim flank).

- !For oval tubes which are oriented aerodynamically in the riding

direction, give the (largest) diameter in the riding direction.

- !Oval tubes set fashionably at right angles to the riding direction
will be treated as round tubes, and the diameter
at right angles to the riding direction is critical."

Frame stay adaptor short 12/20 "left fitting" in driving direction

Priority rear wheel

Option: right fitting by reverse installation (against driving direction)

- For 12 -20mm tube diameters (3 size settings):

- For rear triangle/seat stays (aluminium, carbon, steel, titanium)
- WITHOUT bosses for rim brakes and frame lock.

- Use the flexible underlay pad supplied

- Tube cross-section must be ROUND or OVAL (30mm below rim)

Frame stay adaptor medium 20/32 "left fitting" in driv. dir.

Priority rear wheel

Option: right fitting by reverse installation (against driving direction)

- For 20 - 32mm frame diameter (3 size settings)

- For rear triangles/seat stays (aluminium, carbon, steel, titanium)

- For rigid forks (aluminium, carbon, steel, titanium)
- For telescopic forks for disk brakes

- WITHOUT bosses for rim brakes
- WITHOUT fixed cable clips until 5cm below top edge of the rim

- Use the foam rubber underlay pad supplied

- Tube cross-section must be ROUND or OVAL (30mm below rim)

Frame stay adaptor medium 20/32 "right fitting" in driv. dir. Priority front wheel

Option: left fitting by reverse installation (against driving direction)
necessary e.g. with rim brakes (type caliper, road bike)

- For 20 - 32mm frame diameter (3 size settings)

- For rigid forks (aluminium, carbon, steel, titanium)
- For telescopic forks for disk brakes

- For rear triangles/seat stays (aluminium, carbon, steel, titanium)

- WITHOUT bosses for rim brakes
- WITHOUT fixed cable clips until 5cm below top edge of the rim

- Use the foam rubber underlay pad supplied

- Tube cross-section must be ROUND or OVAL (30mm below rim)

Frame stay adaptor long 32/46 "left fitting" in driving direction

Priority front wheel

Option1: right fitting by reverse installation (against driving direction)
necessary e.g. with rim brakes (type caliper, road bike)
Version2: right fitting bracket (on demand)

- For 32 - 46mm frame diameter (3 size settings)

- For installation scenario as for frame stay adaptor medium

- WITHOUT bosses for rim brakes
- WITHOUT fixed cable clips until 5cm below top edge of the rim

- Use the foam rubber underlay pad supplied

- Tube cross-section must be ROUND or OVAL (30mm below rim)

Front fork fitting on Brompton Folding Bike - for steel fork only

Clamp adapter special Brompton Folding Bike

Front fitting reverse on fork blade right side

- Minimum adjustment

- ONLY for Brompton "steel fork"!

- NOT for Brompton "titanium fork"!

Fitting to special bikes and unusual cases,

Check Feasibility First !

- Recumbents: usually fits via the front fork

For framebuilders & professionals

Special cases often possible by special adaptations or brackets.
- Please have tubing dimensions to hand

- Velomobiles

- Recumbents, trike designs with diagonal seat stays

- Special bikes with unusual frame to wheel distances
- Spacers on demand
Check barriers:
- Reverse mounted brake bosses on front forks pointing to the rear
Specially with small wheels (20 inch and smaller)
- Please ask for a special adjustment (no additional costs),
- Please look for potential conflicts with stays by fenders and racks

Special cases NOT universally possible to fit:

- Shaped tubing with sharp corners (hydroformed)

- Extreme oval tube profiles

- Narrow placed brake bosses cantilever generation 1 early 80ties

- Recumbents, trike designs with horizontal seat stays

Cable colours

- Black

Compatibility

The VELOGICAL Dynamo is compatible problem-free with all types of hub, any wheel size and type of tyre, without any restriction of functionality and without any painful extra costs from special adaptations. For special applications we will be happy to advise on cable routing questions. Please contact us.

Assembly accessories: lamp brackets inc. handlebar mounts

rm (Riese & Müller) lamp bracket for handle bar and for suspension fork (head tube)

B+M (Busch + Müller) dynamo bracket (position long side outside) for horizontal lamp mounting with steel forks

SON (Schmidt Maschinenbau): Products, Accessories

Spanninga: dynamo light accessories

www.fahrrad.de: cycle accessories, "Mounts"

Komponentix Onlineshop: front lights category,
accessories for front lights (at the bottom)

Certification, StVZO Regulations and Design Interpretation

VELOGICAL obtains a StVZO approval according german law regualtion for all three dynamo variations. According to the certification the requirements are met to the power class of 6V 1.5 watts at 15kph (9,3mph) on a digital load according DIN 33958, the new neutral simulation of LED lighting.

The performance of an LED bicycle light with light-based overvol-tage protection is characterised by the light output at particular speeds and not by a defined voltage curve at particular speeds. The possibility of storing power for standlights and slow riding is also implemented in many LED lights.

Efficient and powerful on-board electrical supply (for USB sockets, buffer batteries, on-board electronics devices) can best be achieved with a free-floating dynamo voltage, from which the necessary power can be extracted as required. Thus the power production within the dynamo, and regulation technology outside it, should sensibly be strictly separate.

Testimonials

VELOGICAL Dynamo with C.V., year-round cyclist/commuter from Hamburg

"In the meantime I finally managed to install your dynamo. Cool component, I really like it! The assembly was easy. It makes a little sound while driving, but that doesn't bother me. I hardly notice the resistance. My lamps light up and I never have to pay attention that any batteries are charged. Great! He has already passed a rain ride without any problems. I am curious about snow and ice."

VELOGICAL Dynamo with M.H.´s Gravel-Racer cycling from Berlin to Helsinki reporting on his blog Cyclingtourist:

3. …. "This is the first trip on my new Cyclocross Bike. ……..

b) "On this tour there are some day distances that will require me to cycle in the dark or at night. I had no desire to rely on battery lamps but wanted to be sure I have good lights available whenever needed. However, installing a dynamo hub was no option. There seems to be only one alternative on the market, namely rim dynamos by Velogical Engineering who are by coincidence located in Cologne (my place of residence). They were extremely helpful in finding the perfect solution for my purposes and were willing to answer all my questions about the infinite technical options around energy generation and lights."

LED front lights
Overvoltage protection, metal cooling surface or metal housing, 40 lux and more

B+M (Busch+Mueller)

IQ-X all Sub-Models
IQ-XS all Sub-Models
EYC all Sub-Models
CYO all Sub-Models

CYO PREMIUM all Sub-Models
LUXOS B

LUXOS U from series 2 on (tested 04_2014)

SUPERNOVA

E3 PURE 3
E3 PRO 2
E3 Triple

EXPOSURE LIGHTS
Revo Dynamo

HERRMANS
H-One S
H-Black Pro

TRELOCK

LS 885
LS 875

BÜCHEL

Secu Evolution

SON / SCHMIDT MASCHINENBAU

Edelux

Edelux II

SON partially warns to use a combination of Velogical Dynamo plus Edelux, but it should be noted, that SON is a manufacturer of competing dynamo products.

PHILIPS

SafeRide ® LED-Headlight

All specifications are subject to technical change

In combination with the additional overvoltage protector
Shimano "SM-DH10A", additionally to the VELOGICAL thermistor every LED-Bikelight can be used.

Bicycle chargers with charging current control
not optimized for hub dynamos, suitable for rim-dynamo
No connection in parallel to AC LED lights for dynamo:

FORUMSLADER for VELOGICAL contact form, click here

E-Werk + Cache Battery (Busch + Mueller), click here

LED rear lights

SPANNINGA
PIXEO XS
Installation: seat stay, seat tube, mud guard (fender)

NR 9

VENA
Installation: mud guard (fender)

BÜCHEL

LED FIRE
Installation: mud guard (fender)

B+M (Busch+Mueller)

SECULA PLUS

Installation: seat post, seat tube, seat stay

SECULA PLUS
Installation: mud guard (fender)

SECULITE PLUS

Installation: seat stay, mud guard (fender)
LINE

LINE SMALL

MINI

FLAT S

TOPLIGHT (and others)
Installation: rear rack

PHILIPS
SafeRide LED-Rearlight (Vers. Dynamo)
Installation: rear rack

SafeRide LED-Lightring (Vers. Dynamo)

Installation: seat post

SON / SCHMIDT MASCHINENBAU
Rearlight
Installation: mud guard (fender), seat post, rear rack

SUPERNOVA
E3 Tail Light /
Only in combination with SUPERNOVA Head Light
Installation: seatpost, seat tube, rear rack

All specifications are subject to technical change

VELOGICAL Dynamo Overview

- Extremely smooth running (drag below the perception threshold)

- Minimal weight and miniature form factor ∅ 75g (depending on the bracket)

- Extremely high efficiency (> 60 - 75%)

- Latest materials technology and high power rare earth magnets

- Preservative use of raw materials

- Disengageable (by folding away)

- Retrofittable and universally compatible
- optimized contact surfaces, rainproof lighting

- For LED lights with metal cooling surface (40 lux and more)

Seizing the Initiative - the Story of an Innovation

The VELOGICAL Dynamo is an extremely lightweight high end LED lighting power system for bicycles in a miniature form-factor. Its 'hard skills' are extremely smooth running (low drag) even at high riding speeds, minimal weight and high efficiency for use with modern LED bicycle lights. This compact dynamo genuinely weighs less than a mere 75g! And it operates with minimal resistance, below the perception threshold. Thanks to highest electrical efficiency it supports passive safety in traffic while working as a daylight running light, too. This patented bicycle dynamo for LED lighting has been developed especially for the requirements of sports-oriented cyclists.

The VELOGICAL bicycle dynamo is a so-called rim-dynamo, because it runs on the flat braking surface of the rim. The design of the adjustable bracket achieves optimized contact pressure with minimal contact patch. The miniaturized VELOGICAL Dynamo with its remarkably powerful output is an alternative to hub dynamos. In doing so, the VELOGICAL Dynamo runs without wear on the rim wall, and can also be driven without problems on carbon rims. The internal mechanism of the VELOGICAL Dynamo is practically wear free. It works with unobtrusive reliability, producing energy for LED lights even in the wet.

The idea behind this product was to take advantage of the optimal location which the bicycle has to offer, from a dynamo drive point of view: The VELOGICAL Dynamo rotates 20x faster than a hub dynamo, so it can be made correspondingly smaller and lighter. It rolls almost silently, turbine-style, on the rim. Using the latest magnetic materials, the VELOGICAL Dynamo delivers the very best test results, both in the lab and in practice (assuming it's fitted correctly of course). Efficiency levels are on average around 70%, and at 30km/h higher than 70% - at 6volts and 3watts. With the VELOGICAL Dynamo, weighing a featherweight 75g(!), you also save on the effort required to compensate for the approx of a heavy hub dynamo or the extra weight of powerful battery lights.

And don't forget: with a side-running dynamo, when not being used it can be disengaged entirely, while a slow and ever-turning hub dynamo is always operating, slowing you with its magnetic drag: a constant effect, even when the lights are switched off.

The VELOGICAL Dynamo is not only highly energy efficient, but also universal compatible and retro-fittable. Cycle aesthetes and sports riders who want to appreciate the benefits of this next-generation dynamo-powered cycle lighting system can, it goes without saying, keep their carefully-selected high-tech wheelsets intact without replacing the front hub for a hub dynamo.

In the course of researching the product it became clear that the famous French constructeurs (such as Herse, Singer, Daudon) had already investigated rim dynamos in the early 1950s on their touring bikes, using various types of drive wheel. In 1980s, mountain bikers also investigated this system, because of the rough profile of off-road tyres and because heavy battery lights would not stay secure on the handlebars for long, especially over rough terrain. For battery lights, the mounting was the Achilles' heel.

Overall, these earlier experiments with rim dynamos did not perform as well as was desired, because the fundamental problem of frictional resistance at high riding speeds had not been solved. To resolve this problem (high speed drag), simply moving the contact point from the tyre to the rim is not sufficient. Only a complete revision of the side-runner principle can achieve this, as demonstrated by the product shown here.

Dynamo design: VELOGICAL engineering GmbH Dipl. Ing. Peter Frieden

Dynamo series production: VELOGICAL engineering GmbH

Distictive Marks

RIM-DYNAMO (mini generator LED lighting): engraved Logo VELOGICAL on the top, onesided mounting

VELOSPEEDER (mini standard motor): four hexagon socket screws on the top, double-sided mounting