Actual weight of Shimano XT FC-M785 crank vs XTR

Discuss light weight issues concerning mountain bikes & parts.

Moderator: Moderator Team

Post Reply
User avatar
hjb1000
Posts: 257
Joined: Wed Sep 16, 2009 10:25 am
Location: Australia

by hjb1000

Just checking up on the weight of the double FC-M785- anyone here have actual weights?

Upgrading my girls mtb cranks from the heavy FC-M542's and want to see what sort of weight savings can be achieved. I would also consider the FC-M985 XTR double if there is a reasonable weight reduction.

FC-M542- 960 g with BB (I believe)
FC-M785 XT double -740g (Competitive Cyclist listed weight, BB included or excluded?) EDIT- Bike24 list these as 810g with BB which is less impressive...
FC-M985 XTR double 'Race'- 629g (Competitive Cyclist listed weight, BB included or excluded?)

So best case scenario that's a 331 g reduction if you go from M542 to XTR, sounds good right?

EDIT- May have just answered my own question, found this: http://www.birota.ru/files/news/2010/xtr-weight.pdf
So XTR FC-M985 is 715g

Making best case scenario 245g.

Thoughts on this being a good area to reduce weight?

by Weenie


User avatar
rainerhq
Posts: 642
Joined: Wed Dec 15, 2010 10:32 am
Location: Estonia

by rainerhq

FC-M785, 40/28, 175mm: 733g
BB: 92g, with 3x 2,5mm spacer.

Installed those yesterday.
"Nothing compares to the simple pleasure of a bike ride"
Jamis Renegade Expert
Spark 900 RC

User avatar
hjb1000
Posts: 257
Joined: Wed Sep 16, 2009 10:25 am
Location: Australia

by hjb1000

Thanks for that rainerhq.
So XT are about 150g lighter than the Deore M542's.

bikemaniack
Posts: 372
Joined: Thu Jul 16, 2009 9:33 pm

by bikemaniack

Here you have weights of whole group

http://www.sicklines.com/2010/08/24/ver ... -m980-xtr/

User avatar
allezkmiec
Posts: 662
Joined: Tue Mar 08, 2005 10:01 pm
Location: New Hampshire
Contact:

by allezkmiec

My 175mm XT M785 26/28 came to 721 grams. BB was 91.

by Weenie


TheRookie
Posts: 910
Joined: Wed Jan 18, 2012 4:23 pm
Location: Midlands, United Kingdom

by TheRookie

I understand that the XT double (and bash) uses a thicker axle than the triple, so if you are WW it start with a triple even if you intend to bash it......plus the Shimano bash is very heavy, circa 150g
Impoverished weight weenie wanna-be!
Budget 26" HT build viewtopic.php?f=10&t=110956

Post Reply
  • Similar Topics
    Replies
    Views
    Last post