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

New: Take Part in the May Giveaway for a Change to Win the Thruster 27.5 Retrograde BMX Cruiser 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
ISO Susan B bike by Terry
Today 03:36 AM
Shimano Deore shifter
Today 02:09 AM
9 speed chain on 8 speed bike
Today 02:06 AM
Expensive bikes with crappy wheels
Yesterday 11:12 AM
Specialized bicycle post issue
Yesterday 06:21 AM
What did your first bicycle mean to you?
05-23-2024 11:38 AM
Doctors are Prescribing Cycling
05-23-2024 11:34 AM
Getting back into riding, bike instead o...
05-22-2024 12:55 AM
What was your first bicycle?
05-21-2024 07:27 PM
Philodo H8
05-20-2024 12:50 PM

[-]
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. Jesper
32 posts
no avatar 2. Nutribun
22 posts
no avatar 3. enkei
20 posts
no avatar 4. Burrobabe
14 posts
no avatar 5. GirishH
13 posts