Shimano GRX 31 tooth chainring on a Praxis Zayante Crankset?
Results 1 to 7 of 7
  1. #1
    Cleavage Of The Tetons
    Reputation: rideit's Avatar
    Join Date
    Feb 2005
    Posts
    1,351

    Shimano GRX 31 tooth chainring on a Praxis Zayante Crankset?

    Did a bunch of googling, couldn't find what the BCD's are on these two cranksets. I would love to drop one tooth up front...

  2. #2
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2002
    Posts
    21,105
    Quote Originally Posted by rideit View Post
    Did a bunch of googling, couldn't find what the BCD's are on these two cranksets. I would love to drop one tooth up front...
    One tooth? 3%? That's 2 rpm at a 70 rpm climbing cadence. It comes under the heading "barely detectable."

  3. #3
    Cleavage Of The Tetons
    Reputation: rideit's Avatar
    Join Date
    Feb 2005
    Posts
    1,351
    Detectable by me 150 miles into a gravel only ride with over 10k of climbing.
    YMMV

  4. #4
    RoadBikeReview Member
    Reputation: Srode's Avatar
    Join Date
    Aug 2012
    Posts
    3,485
    Quote Originally Posted by rideit View Post
    Detectable by me 150 miles into a gravel only ride with over 10k of climbing.
    YMMV
    Gravel Worlds? What cassette are you running?
    Gravel Rocks

    Trek Domane
    Niner RLT9 (Gravel Bike)
    BH G7 Disc
    Trek Crockett

  5. #5
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2010
    Posts
    9,090
    Quote Originally Posted by rideit View Post
    Detectable by me 150 miles into a gravel only ride with over 10k of climbing.
    YMMV
    Being able to detect a difference by considering not using it is an interesting super power.

    Shimano lists the BCD as 110 / 80mm. I do not know if that means there are two sets of bolts on the double or if that's the BCD for the 1x and 2x.

  6. #6
    Adorable Furry Hombre
    Reputation: Marc's Avatar
    Join Date
    Jan 2005
    Posts
    28,426
    Quote Originally Posted by rideit View Post
    Did a bunch of googling, couldn't find what the BCD's are on these two cranksets. I would love to drop one tooth up front...
    This won't work.

    One is a 4-arm AKA 4-bolt ring pattern; the other is a 5-arm AKA 5-bolt ring. Even if they were the same arm/bolt-count the BCDs are off: Praxis is 110mm and Shimano uses 80mm. Mssr Strongbow up thread is correct--the Shimano cranks use two sets of chainring bolts like many subcompact cranks, whereas Praxis only use one. See Page 21 of the DM: https://si.shimano.com/pdfs/dm/DM-GAFC001-00-ENG.pdf

    If you want a 48/31 or 46/30 it means new cranks, sorry amigo. Praxis stuck to the 110mm BCD for the sake of arm compatibility...and the only way they were able to get a 32T ring is some very clever and precise machining and placement--otherwise normally a 110mm BCD would bottom out at 34t/33T
    "Refreshingly Unconcerned With The Vulgar Exigencies Of Veracity "

  7. #7
    Cleavage Of The Tetons
    Reputation: rideit's Avatar
    Join Date
    Feb 2005
    Posts
    1,351
    Quote Originally Posted by Srode View Post
    Gravel Worlds? What cassette are you running?
    I ride Around The Rock every year. 11-36. I might even go to a 40. Granted, the last 50 miles can be paved, (but 11% grades to finish).

    https://www.fitzgeraldsbicycles.com/...round-the-rock

    I am 53, I'll take every (non motorized) mechanical advantage that I can get!

Similar Threads

  1. Praxis Alba vs Praxis Alba 2d
    By ToiletSiphon in forum Components, Wrenching
    Replies: 0
    Last Post: 07-27-2017, 06:40 PM
  2. FSA Gossamer vs 105 5800 vs Praxis Zayante
    By alexm370 in forum Specialized
    Replies: 8
    Last Post: 09-23-2016, 11:45 AM
  3. Stages Power meter on Praxis Turn zayante
    By steview130 in forum Components, Wrenching
    Replies: 6
    Last Post: 09-12-2016, 07:17 AM
  4. Praxis Works Turn Zayante BB30
    By Specialized_One in forum Components, Wrenching
    Replies: 11
    Last Post: 08-31-2016, 10:41 PM
  5. Replies: 11
    Last Post: 11-25-2014, 12:02 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT ROADBIKEREVIEW

VISIT US AT

© Copyright 2019 VerticalScope Inc. All rights reserved.