Jump to content

XT upgrade, confusion with sizes


Domin8tr

Recommended Posts

I'm considering upgrading my complete groupset to XT. i have various bits of SRAM.Time for a change!

 

 

 

My questions are as follows:

 

 

 

1. Front derailleur comes in 2 sizes 28.6 & 34.9 and 31.8          &34.9, how do i figure out what size to use?

 

 

 

2. How do I measure crank length, from the center of the BB to the center of the pedal spindle?

 

 

 

3. Re the rear derailleur, is the Shadow the best option?

 

 

 

Shotski!

Link to comment
Share on other sites

1. measure the diameter if the seat tube with a vernier - or what frame do you have - most shimano derailleurs are dual pull and come with the bands to accommodate all 3 sizes so its one size fits all.

 

 

 

2. it should be stamped on your current crank arm near the pedal - 97% of the time it will be a 175mm

 

 

 

3. personal preference.

 

 

 

4. most people change from shimano to sram....

Link to comment
Share on other sites

The new XT derailleurs comes with shims. So see what size you seat post collar is and get the same. Otherwise check the seatpost size and see which one is just bigger then that.

 

 

 

There's normally a number printed on the inside of the cranks at the pedal hole. Otherwise your method is 100%

 

 

 

Shadow XT is the best you can get.

Link to comment
Share on other sites

4. Most people THINK Sram is better...I don't think its leaps and bounds ahead, it all works the same...

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Settings My Forum Content My Followed Content Forum Settings Ad Messages My Ads My Favourites My Saved Alerts My Pay Deals Help Logout