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

New: Take part in the March Giveaway for HONBIKE Uni4 long-range commuter E-bike valued at $1699 ⚡


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
Help me choose an electric long-tail bik...
Today 03:38 PM
Just got my bike fixed up, looking for a...
Yesterday 11:38 PM
Is Presta valve lock nut useful?
Yesterday 05:02 PM
Everesting show of hands
Yesterday 02:43 PM
CHANGING 1x8 into 2x8
Yesterday 05:46 AM
Souke Sports Cycling Apparel Discussion ...
03-27-2023 11:54 PM
Handlebars are either too loose or too t...
03-27-2023 07:49 PM
What are your best biking places in your...
03-27-2023 07:39 PM
Avoiding punctures on road bike
03-27-2023 07:23 PM
Little known bike spots
03-27-2023 09:12 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. ichitan
30 posts
no avatar 2. ReapThaWhirlwind
27 posts
no avatar 3. Lss555
12 posts
no avatar 4. GirishH
10 posts
no avatar 5. Talha
10 posts