Connect with us

CONTACT US (editorial board)

365mountain bikes

News

SRAM EX1, the transmission dedicated to E-bikes


Sram has produced the first transmission specifically dedicated to E-MTBs, starting from a correct analysis of the forces acting on the transmission, which result from the sum of the powers developed by the engine and the biker's musculature. Sram technicians have revolutionized the concept of transmission with the main objective of significantly improving its reliability.

The most innovative component of the entire transmission is, without a doubt, the 8-speed cassette with 11, 13, 15, 18, 24, 32, 40 and 48 tooth sprockets. It is a cassette compatible with non-DX hubs which has the great advantage of significantly reducing the crossing of the chain which, moreover, can have a greater width, all resulting in a level of reliability far superior to that ensured by traditional transmissions.

ex1 p

The greater power available allows you to manage different spacings between the ratios, in order to widen the range despite the reduced number of sprockets.

The very short ratios, made available by the EX1 transmission, also allow you to overcome impossible climbs with adequate cadences such as to increase the autonomy of the battery.

The gear ratios dedicated to the Bosch motor are mounted directly on the cranks with toothings of your choice between 14, 16 and 18 teeth which are equivalent, by virtue of the internal gear ratio of 2,5 times, to 35, 40 and 45 teeth.

In case of combination with a Brose engine we have a 34 tooth gearbox with 104 BCD spider. The profile of the cranks allows to reduce the “Q” factor.

The command, always with the aim of maximum reliability, allows the single jump of the pinion both in the up and down direction. The gearbox has also been revised for greater reliability.



Written by

Mauro saw the birth of the MTB world and has always been in the off-road sector, as an athlete and MTB Guide (between the 80s and 90s) and as a photographer and journalist.

CORRELATED ARTICLES

COMMENCAL Tempo Power: The Art of Movement

News

Bosch Blocks E-Bike Batteries in Case of Theft

News

E-MTB XMAS | Discover gift ideas for e-bike lovers!

News

advertisement

PRIVACY POLICY - DEONTOLOGICAL LEGISLATION - FACT CHECKING REGULATION - CORRECTIONS - COOKIES POLICY
365mountainbike is a newspaper registered at the civil and criminal court of Verona on 10/01/2012
Copyright © 2019 | 365 sport srl (04835100233)
via Brenta, 7 - 37057 San Giovanni Lupatoto (VR)

© 365 sport srl All rights reserved. The articles contained in the site cannot be copied or reproduced by other means without a license granted by the author. The public reproduction of a content of the site, in whole or in part, by any means, without the express written permission of the author, is prohibited.

Connect