Completely New Bike Drivetrain May Change The Definition Of “Bike.”

Lifestyle, News I By Tom Martin I September 02, 2021

Batteries on bicycles are already changing the transportation scene significantly. A new generator-based method of transferring pedal power to drive wheels is being developed by German component makers Schaeffler replaces the bottom bracket with a generator and eliminates the need for a chain, and possible gears/derailleur. It is 5% less efficient than straight line chain drive, but by “cutting” the mechanical alignment of rider and rear wheel, it allows innovative packaging options that couldn’t be delivered with conventional chain drive. This effectively reinforces the point that some companies see bikes as a very broad transportation category. If we consider that e-bikes make cargo bikes a practical reality and “slow motorcycles” (e-bikes requiring little or no rider power) are another, and scooters are a third, then the part of cycling many of us know and love (recreational bicycles = road and mountain bikes) is just a part of what is being revolutionized. A 5% efficiency loss isn’t ideal, but in the context of e-bikes is in the category of a small amount of weight or bad aero or rolling resistance. If so, being able to do packaging where the rider/pedals do not need a straight line connection to the rear hub might give packaging freedom that is useful (low CG child/dog seats or trunk or side by side seating behind rider?). And with batteries on board, the 5% is something the user will experience as range reduction, not an all-the-time riding drag.

Find more here.


The Guide to Road Racing: Winding Road Magazine's ultimate guide to getting your start in racing.

Table of Contents

Related Articles

BUGATTI TYPE 35: The Making of A Champion

Setting the blueprint for all Bugatti cars that followed, the Type 35 was designed and engineered like no other, and featured world-firsts to ensure unmatched…

March 14, 2024
Revealed: Honda E-Bike

The Honda e-bike promises to bring innovation and expertise from its motorcycle business to the burgeoning electric bicycle sector.

November 10, 2023
Kia Next to Adopt Tesla’s NACS Charging Network

Kia has announced its intention to adopt Tesla’s North American Charging Standard (NACS) in the fourth quarter of 2024.

October 06, 2023
Vehicle Title Transfers: Cario’s Revolutionizing Blockchain Solution

Cario announced the launch of its blockchain-based platform, designed to fix the way vehicle title transfers is done.

September 08, 2023
Texas Pushes Forward with Tesla NACS Mandate

Texas has given the green light to a controversial plan that mandates the inclusion of Tesla NACS technology in EV charging stations.

August 17, 2023


Get the latest driving and racing news straight to your inbox.

no thanks

Begin typing your search above and press return to search.