BMW Customization Workshop · Neuwied
BMW Twinshock conversion parts R45 to R100
Two shock absorbers, classic lines: The Twinshock Boxer models from BMW are the original foundation for café racers and bobbers. Here you will find all the parts we develop for the dual-arm swingarm with two shock absorbers – suitable for the R45, R65, R75, R80, R90, and R100.
- Construction time1969–1985
- ModelsR45 – R100
- Struts2
- TypicalCafé Racer & Bobber
73+
Matching parts
1994
Manufacturer since
TÜV
Expert report & ABE
Since 1994BMW conversion workshop in Neuwied
Conversion by assembly group
Everything for your Twinshock conversion
Vom Heck bis zur Elektrik: Wähle die Baugruppe – oder scrolle direkt zu allen Teilen für Twinshock-Boxer.
01
Tail conversion
Rear frames, seats, fenders, and license plate holders – with TÜV certification.
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02
Front conversion
Triple clamps, headlights, speedometers, handlebars, and mounts for a clean front end.
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03
Exhaust
Complete exhaust systems and silencers made of stainless steel, many with ABE (general operating permit).
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04
Chassis
Struts, fork springs, damping systems, and suspension service.
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05
Electrical
Cable harnesses, ignition, regulators, and switches – assembled in-house.
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06
Engine & Performance
Overhaul, carburetor, ignition, and tuning on the test bench.
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All parts for Twin-shock boxer
73Parts available
Why Sport Evolution
Parts from the converter, not from the retailer
1994
Boxer specialist
For over 30 years, we have been building, restoring, and tuning BMW boxer and K-series models in Neuwied.
TÜV
Registrable
TÜV Rheinland certified company. Many parts come with a technical report or ABE (General Operating Permit).
i250
Custom test bench
Carburetor and fuel injection tuning on our Dynojet dynamometer.
100%
Self-driven
Our parts are created on real concept bikes – tested on the road, not in a catalog.
Guide
Twinshock understand
What "Twinshock" means for BMW
Twinshock refers to the classic rear suspension with a dual-sided swingarm and two shock absorbers. BMW used this design from the /5 series in 1969 until the mid-80s – from the R45 and R65 to the R75 and R90, and up to the R80/7 and R100. Visually, it is the most purist foundation: an open frame with a clear view of the transmission and driveshaft.
BMW Twinshock profile
| Design | Dual-sided swingarm with two shock absorbers |
|---|---|
| Production period | 1969 to mid-1980s |
| Models | R45, R65, R75/5–7, R80/7, R90/6, R90S, R100/7, R100S, R100RS, R100RT (up to approx. 1984) |
| Drive | Shaft drive, exposed in the swingarm |
| Typical conversions | Café racer, bobber, roadster |
| Distinguishing feature | One shock absorber each on the left and right of the rear wheel |
Why Twinshock is the #1 café racer base
The continuous rear frame can be neatly shortened or replaced, and the two shock absorbers provide that typically slim silhouette. With a rear conversion kit, you can create a completely new look in no time – whether as a Café Racer, Bobber, or Roadster.
The most important twin-shock parts
- Rear frames & rear conversion kits with TÜV approval for 1 and 2 persons.
- Side-mount license plate holders and battery boxes for rear mounting.
- 36 mm triple trees with TÜV approval for clip-on or tubular handlebars.
- Sport brake discs for the ATE swinging caliper.
- Fender kits in high and low versions, shock absorbers in pairs.
FAQ
Questions about Twinshock
Can't find your question? Use our parts inquiry form – we will respond personally.
How do I know if my BMW is a twin-shock model?
Ganz einfach: Hat dein Hinterrad links und rechts je ein Federbein, ist es ein Twinshock. Monolever und Paralever haben nur ein einziges Federbein auf der rechten Seite.
Do Twinshock parts fit all Twinshock models?
Many do – rear frames, license plate holders, and battery boxes are often designed for R45 to R100 models. For brakes and triple clamps, it depends on the model year. The product titles always list all compatible models.
Are the Twinshock rear frames eligible for registration?
Yes, our twin-shock subframes and rear conversion kits are supplied with a TÜV certificate. You can find more information on our conversion parts with TÜV page.
Which shock absorbers do you recommend for twin-shock setups?
This depends on weight, riding style, and seat height. The ideal length often changes after a tail conversion. We are happy to advise you via our parts inquiry form.