Sizing confusion
Results 1 to 15 of 15
  1. #1
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2014
    Posts
    7

    Sizing confusion

    I am upgrading from a 10 yr old Specialized aluminum road bike(size 54.5) to a new bike. Have shopped at 2 LBS. I like the Specialized Ruby Comp and the Cannondale Synapse. Sizing is a bit confusing. LBS #1 fitted me with Specialized Ruby 57. LBS #2 said Cannondale Synapse size 51 was the correct fit. Does size differ that much in different brands and geometries?
    I am not a super experienced rider and both bikes felt pretty good on short test rides.
    I am 5'7" with a 30 inch inseam.
    Any thoughts?
    Last edited by MtnGinny; 06-19-2014 at 12:20 PM.

  2. #2
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2010
    Posts
    467
    Quote Originally Posted by MtnGinny View Post
    I am upgrading from a 10 yr old Specialized aluminum road bike(size 54.5) to a new bike. Have shopped at 2 LBS. I like the Specialized Ruby Comp and the Cannondale Synapse. Sizing is a bit confusing. LBS #1 fitted me with Specialized Ruby 56. LBS #2 said Cannondale Synapse size 51 was the correct fit. Does size differ that much in different brands and geometries?
    I am not a super experienced rider and both bikes felt pretty good on short test rides.
    I am 5'7" with a 30 inch inseam.
    Any thoughts?
    The specialized Ruby doesn't come in a 56....

  3. #3
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2014
    Posts
    7
    oops, 57

  4. #4
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2012
    Posts
    910
    Ruby is a womens geomenty bike, and Synapse is not. Was it a Roubaix?

  5. #5
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2014
    Posts
    7

  6. #6
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2012
    Posts
    910
    Sorry. Didnt know that they had a womens specific model. The 57 Ruby has a 566mm top tube. The Synapse 51 is 525mm. That is quite a difference. Did you feel more stretched out on the Ruby? Cramped on the Cannondale?

  7. #7
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2010
    Posts
    467
    based on just your height and inseam I would say the LBS that fit you on a Ruby 57 is completely wrong. My guess would be a 51 or a 54 depending on your actual dimensions

  8. #8
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2014
    Posts
    7
    Maybe a bit stretched out on the Ruby. I do have long arms. I rode the bikes about 2 weeks apart so hard to directly compare. I was fairly upright on the Synapse.
    The LBS didn't have a 54 Ruby, but I tried a 54 Amira and felt a little cramped.

  9. #9
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2012
    Posts
    910
    As a point of reference Im 5'8" with a 30" inseam and ride a 54 Roubaix.

  10. #10
    RoadBikeReview Member
    Reputation:
    Join Date
    Dec 2010
    Posts
    1,020
    Size varies widely by brand. I typically ignore the labled sizing on a given frame and look at the geometry chart. In particular, effective top tube is all that really matters. Inseam and seat tube length is almost irrelevant.

  11. #11
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2012
    Posts
    910
    You should not limit yourself to womens specific bikes. They work well for some, but not all.

  12. #12
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2014
    Posts
    7
    Thanks everyone! I think I will be doing more test riding :-)

  13. #13
    RoadBikeReview Member
    Reputation: 9W9W's Avatar
    Join Date
    Apr 2012
    Posts
    2,740
    Quote Originally Posted by MtnGinny View Post
    Thanks everyone! I think I will be doing more test riding :-)
    also for reference:
    Mah wimminz is 5'9.5 and rides a 56 Synapse (womens specific), she's all leg (tall jeans only). IIRC, the geo on the 56 synapse has a 54 effective toptube.

  14. #14
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2009
    Posts
    148
    Go with the 51cm. You can always add a longer stem if it's a little short. If it feels too upright you can flip the stem to drop the bars.

  15. #15
    RoadBikeReview Member
    Reputation: 9W9W's Avatar
    Join Date
    Apr 2012
    Posts
    2,740
    Quote Originally Posted by g-dawg View Post
    Go with the 51cm. You can always add a longer stem if it's a little short. If it feels too upright you can flip the stem to drop the bars.
    While true somewhat, don't forget about the implications a smaller frame has on your head tube. You can get a longer stem, but you can only stack so many spacers onto your steerer to compensate for the 1-1.5cm drop in HT length from the larger frame per size.

Similar Threads

  1. MXL sizing confusion
    By bolo yeung in forum Merckx
    Replies: 5
    Last Post: 09-02-2014, 02:13 PM
  2. Square Taper Bottom bracket confusion, confusion, confusion!!!
    By Ride-Fly in forum Components, Wrenching
    Replies: 7
    Last Post: 10-06-2010, 08:30 PM
  3. '08 Kona JtS... sizing and confusion!
    By Marcos_E in forum Beginner's Corner
    Replies: 2
    Last Post: 08-03-2008, 05:06 PM
  4. Confusion over frame sizing.. 5' 10.5" and I need a 58cm?
    By mwilcko2 in forum Bikes, Frames and Forks
    Replies: 14
    Last Post: 04-04-2008, 03:29 PM
  5. Confusion about Sys 6..Help!
    By jinxkal in forum Cannondale
    Replies: 4
    Last Post: 06-04-2007, 06:43 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 2020 VerticalScope Inc. All rights reserved.