Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the November Giveaway for the TurboAnt Thunder T1 Fat Tire E-bike


Shimano Nexus 7 shifter replacement problem
#1
hi folks

i have a bike with shimano nexus 7 hub gears and a broken shifter. i replaced the shifter but it seems that the shifter is not completely compatible with the gear system. the shifter is a shimano 'revoshift' 7 speed.

however i calibrate i loose one end of the gears, and position 3 and 5 on the shifter either do not change or the gears jump around, the rest of the positions hold the gear well.... e.g.

shifter - gear
1 - 1
2 - 2
3 - -
4 - 3
5 - -
6 - 5?
7 - 6?

so it seems that the distance the cable is pulled by the shifter for each click, is not the same as the distance the cassete joint pulley needs to move to change one gear.

it seems odd that the two would not be compatible with each other as they are both shimano and 7 speed etc.

can anybody help?

cheers!

fred
  Reply
#2
Hi Fred;

The problem is that the Revoshift without Nexus in its name is for a derailleurs, not hub gears; and of course Shimano being ______ the travel is different between the two.

I got caught the other way around when I found a Nexus 8 speed shifter for an incredibly low price...

You need one of these:
http://www.amazon.com/Shimano-Nexus-7S10-7sp-Revo-shifter/dp/B000R3CBRU/
Nigel
  Reply
#3
a ha i see... that would definitely explain it...

what nice people they are, with our best interests at heart Wink

thanks a lot for a quick reply nigel, much appreciated!

fred
  Reply
#4
This is the Shimano EU site, read the tech docs for your components;
http://cycle.shimano-eu.com/
and shifter is;
http://techdocs.shimano.com/media/techdocs/content/cycle/SI/Nexus/ShiftLever/SL-7S20/6M50B-001_SL-7S20-EN_v1_m56577569830649643.pdf
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Seeking recommendations
Yesterday 03:32 AM
Which aspects of e-bikes do you think ar...
12-04-2021 10:24 PM
Help! Trying to identify this bike
12-04-2021 02:45 AM
Please help me identify this old bicycle...
12-02-2021 11:36 AM
What is your dream cycling destination?
12-01-2021 02:33 AM
LYGIE AND ATALA WINTER PROJECTS
11-30-2021 10:34 AM
Yet another bike ID thread (Pseudo-Batta...
11-30-2021 06:18 AM
Schwinn meridian fork replacement
11-30-2021 12:41 AM
New Memeber
11-27-2021 06:51 PM
Budget Carbon Frames! ...who has bought...
11-26-2021 12:45 AM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. ReapThaWhirlwind
30 posts
no avatar 2. Jesper
21 posts
no avatar 3. jeffg
7 posts
no avatar 4. steven chen
6 posts
no avatar 5. Papa Dom
5 posts