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

New: Take part in the October Giveaway for the Haven Bicycle Co. beach cruiser


Changing rear cassette
#1
Hi I am a new member and would like help with the following question. If I change the cassette on my 10 speed roadbike from 12-25 to 12-32 will I need a new rear derailleur.
  Reply
#2
Depends on what der you have now. They have ranges that they are designed to handle. Try to find the model number on the derailleur so you can look up its acceptable gear range. Look on the back of the pulley cage.

You'll probably need a slightly longer chain regardless. But not a bad idea to change chains with a new cassette anyway.
  Reply
#3
(02-08-2011, 01:08 PM)DaveM Wrote:  Depends on what der you have now. They have ranges that they are designed to handle. Try to find the model number on the derailleur so you can look up its acceptable gear range. Look on the back of the pulley cage.

You'll probably need a slightly longer chain regardless. But not a bad idea to change chains with a new cassette anyway.

Thanks will look that up.
  Reply
#4
"Thanks will look that up".

I've just gone from a 12 - 25 to 11 - 28 and my Shimano 105 5600 short cage rear derailleur only just coped as Shimano only recommend going to a 27 on a 5600. If you go as low as you want, I think you'll need a long cage with the resulting longer chain.

Hope this helps.

W.
  Reply
#5
You are spot on I did it last weekend and had to change the rear mech and chain as well. Very pleased with the range of gears now so well worth doing.

(04-04-2011, 12:34 PM)wazgill uk Wrote:  "Thanks will look that up".

I've just gone from a 12 - 25 to 11 - 28 and my Shimano 105 5600 short cage rear derailleur only just coped as Shimano only recommend going to a 27 on a 5600. If you go as low as you want, I think you'll need a long cage with the resulting longer chain.

Hope this helps.

W.
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
[Sponsored] Souke Sports Cycling Apparel...
Yesterday 10:21 PM
Want to convert my 2012 salsa Fargo 2 to...
Yesterday 12:51 PM
What was your first bicycle?
10-18-2021 03:42 PM
WD40 on chain?
10-18-2021 07:29 AM
VINTAGE DERAILLEURS: Campagnolo 50s-80s
10-18-2021 02:37 AM
What's your No.1 concern when you purcha...
10-17-2021 09:18 PM
Chain skips under heavy load when pedall...
10-17-2021 06:18 PM
Gears changing by themselves
10-17-2021 06:05 PM
Bike evaluation
10-16-2021 02:06 AM
V Brakes just won’t adjust properly
10-16-2021 12:19 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. Souke Sports
28 posts
no avatar 2. Criminal
11 posts
no avatar 3. Zviedrs
9 posts
no avatar 4. JoJoJo
9 posts
no avatar 5. ReapThaWhirlwind
9 posts