What cassette?

What bike and bike bits should you buy?
Bwgan
Posts: 361
Joined: Wed Oct 03, 2012 19:55 pm

What cassette?

Postby Bwgan » Wed Dec 12, 2012 22:25 pm

Hi guys,

I'm building up my first road bike and have got a 9 speed Ultegra 6500 rear mech with a short cage. I'll be running 2 rings on the front. My question is what cassette should I get for the rear, is there a max amount of teeth the top cog can have i.e. 25 or 27?
Cheers

User avatar
smidsy
Posts: 5256
Joined: Tue Jan 17, 2012 20:52 pm

Re: What cassette?

Postby smidsy » Wed Dec 12, 2012 22:42 pm

Yellow is the new Black.

Bwgan
Posts: 361
Joined: Wed Oct 03, 2012 19:55 pm

Re: What cassette?

Postby Bwgan » Wed Dec 12, 2012 22:48 pm

Brilliant, thanks for that

User avatar
bernithebiker
Posts: 3366
Joined: Mon Nov 19, 2012 14:54 pm

Re: What cassette?

Postby bernithebiker » Thu Dec 13, 2012 08:29 am

Bwgan wrote:Hi guys,

I'm building up my first road bike and have got a 9 speed Ultegra 6500 rear mech with a short cage. I'll be running 2 rings on the front. My question is what cassette should I get for the rear, is there a max amount of teeth the top cog can have i.e. 25 or 27?
Cheers


yes but which 2 rings up front? Standard (53/39 usually) or compact (50/34 usually).

Knowing this will affect what decision you make on cassette size.

A 'tight' cassette like a 23-12 or 23-11 will give you smooth changes with little step in between gears. But make sure your low gear is low enough.
http://www.cyclespeedtours.com

Bespoke and 5* cycle trips based in Palma, Mallorca.

User avatar
drlodge
Posts: 3622
Joined: Thu Jul 26, 2012 08:29 am

Re: What cassette?

Postby drlodge » Thu Dec 13, 2012 12:20 pm

Bear in mind that the step from 11 to 12 is the same as 22 to 24, so 2 teeth difference at the larger sprockets sizes is fine.

I would start wth defining what your bottom gear needs to be - what's the steepest hill you're going to climb and what gear do you need for that? Given your small chain ring size (what ever it is), that will define what your largest sprocket needs to be.

For example, I need a 27 sprocoket with 34 chain ring for steep hills, but on an 11 speed setup that gives a nice compact cassette still 12-13-14-15-16-17-19-21-23-25-27
WyndyMilla Massive Attack | Rourke 953 | Condor Italia 531 Pro | Boardman CX Pro | DT Swiss RR440 Tubeless Wheels
Find me on Strava


Return to “Road Buying Advice”

Who is online

Users browsing this forum: gaffer_slow, Google Feedfetcher, pingo and 8 guests