in

New Cervélo, in between sizes, which one to choose?

Last post 05-30-2013 10:09 AM by Velo E. 14 replies.
Page 1 of 1 (15 items)
Sort Posts: Previous Next
  • 04-23-2013 2:38 PM

    • The.Wolf
    • Not Ranked
    • Joined on 04-23-2013
    • Ottawa, ON / Montreal, QC
    • Posts 2

    New Cervélo, in between sizes, which one to choose?

    I am currently in the process of buying a brand new Cervélo R3 2013. I am 170 cm with a 76cm inseam. At my lbs, the seller told me I'd be good for either a 48 or 51 cm frame He then strongly advised me to go with the 48. He had both in stock. The bike will be mainly used for 60 - 80 weekends rides or occasional 100 + km Also, 35 km commuting. I have a fitting scheduled Thursday afternoon and just wanted to make sure that I was heading in the right direction. What would be the impact of the smaller frame? Thank you
  • 04-23-2013 2:48 PM In reply to

    • jdais
    • Top 25 Contributor
    • Joined on 09-10-2008
    • Long Island, NY
    • Posts 737

    Re: New Cervélo, in between sizes, which one to choose?

    If you can fit the 51 without feeling overstretched, then go with 51.  48 might not fit larger waterbottles and may require you to use 650 wheels

  • 04-23-2013 3:07 PM In reply to

    • Kookie
    • Top 50 Contributor
    • Joined on 02-04-2012
    • Toronto
    • Posts 443

    Re: New Cervélo, in between sizes, which one to choose?

     I am the exact same size as you and I have a 51cm...(also have a 54cm which is fine but needed 90cm stem instead of stock 100cm)

    2017 Cervelo S5 SRAM eTap
    2018 Cervelo R5 Classics Edition Limited Frameset
  • 04-23-2013 3:19 PM In reply to

    Re: New Cervélo, in between sizes, which one to choose?

    I agree get a the bigger bike for the water bottle issue
    2011 S3
    2011 R3 (Warrantied)
    2014 R3
    Garmin 800(RIP)
    Garmin 1000
    2014 Beyond the Forum Rider
  • 04-24-2013 8:06 AM In reply to

    Re: New Cervélo, in between sizes, which one to choose?

    I had the same choice to make. The headtube on the 48 is a fair bit shorter and I'm not very flexible so unless you want to get a very low riding position you may be better off with the larger frame.
  • 04-24-2013 9:51 AM In reply to

    Re: New Cervélo, in between sizes, which one to choose?

     I had the same decision and went with the larger frame to avoid the limited 650 wheel options. In my preliminary searches, due to limited availability of 650s and even more limited demand, when you find a sale on wheels they tend to be very good sales, but otherwise tough to find.

     As a result I ended up using a stubby 70mm -6 degree stem on my 51cm.

    2012 R3 Team - Ultegra - Hed Jet 5 Express - Garmin 910xt
    2011 R3 - Ultegra - Dura Ace C24 (RIP)
  • 04-24-2013 10:38 PM In reply to

    • The.Wolf
    • Not Ranked
    • Joined on 04-23-2013
    • Ottawa, ON / Montreal, QC
    • Posts 2

    Re: New Cervélo, in between sizes, which one to choose?

    I did not even think about the wheel size being an issue! Thank you for that! I called the shop and they told me they could hold the 51 for me until the fitting tomorrow so I can choose.. With this in mind, I'm pretty sure I'll go with the 51cm! Thanks everyone!
  • 04-24-2013 10:50 PM In reply to

    Re: New Cervélo, in between sizes, which one to choose?

    Based on your measurements, 51cm probably works better for you but just on a side note if you end up with a smaller frame - I ride 48cm S2 with regular wheels (700). No issues at all (toe overlap never been an issue...) In terms of water bottles - yes the tall ones won't fit in the downtube. Regular ones, no problem.
    2009 S2, SRAM Rival, 50/34 Rotor Q-Rings, Mavic Cosmic Pro Carbons / Mavic Ksyrium SLs 7.2Kg
  • 04-25-2013 1:20 AM In reply to

    Re: New Cervélo, in between sizes, which one to choose?

    I am 171 with 81 inseam and riding a 51 S2.
  • 04-30-2013 9:48 AM In reply to

    • racewatcher
    • Top 100 Contributor
    • Joined on 09-09-2011
    • Newfoundland and Labrador
    • Posts 215

    Re: New Cervélo, in between sizes, which one to choose?

    I'm 167 on a 51 cm S2. Can you ride both and see how it feels?
    racewatcher
  • 04-30-2013 12:53 PM In reply to

    Re: New Cervélo, in between sizes, which one to choose?

    I am 5'6.5" (167.4cm) and 30" (76cm) inseam which is about your dimensions and I went with a 2013 48cm which comes with 700c wheels.  I have no problems with the long Camelbak insulated water bottle fitting in an Arundel Mandible cage in the seat tube.  I think if you went 51 you'd be too stretched out - at least I was.  I test rode the 51 first and then the 48.  Immediately, the 48 just felt right - like a glove.  Test rode the bikes (48 and 51) back to back again and again and the 48 always felt better.

    I could have gone with a 51, but then I'd have to shorten the stem and also move to a 0 offset seatpost.  With the 48 I didn't have to adjust anything.  Even with the 48, I have to run my saddle more forward than normal.  The only thing with the 48 is the head tube is short so I have quite a bit of spacers under my stem.   

  • 05-29-2013 3:46 PM In reply to

    • wayne
    • Not Ranked
    • Joined on 05-29-2013
    • Posts 5

    Re: New Cervélo, in between sizes, which one to choose?

     Body build is an important consideration. A small bike frame set up for a correct reach and seat height will flex more under load with a heavy rider. A lonver stem and seat post extension adds leverage to the riders weight and strength. Conversly, a light rider on a larger frame will stress the frame below the design and will feel rigid and dead.

     If possible, ride them both.

  • 05-30-2013 5:21 AM In reply to

    • goodboyr
    • Top 10 Contributor
    • Joined on 08-16-2007
    • Thornhill, Ontario
    • Posts 974

    Re: New Cervélo, in between sizes, which one to choose?

    Not true. I'm sure the difference in feel is about size and geometry, not how much flex there is.
    Bobbo
    2015 COR
    '06 R3, Fully Internal Dura Ace 7970, Zipp 303FC Clinchers
    S5 Team, Ultegra Di2, Zipp 101
    RCA 56cm, Dura Ace 9070, Zipp 404 FC Tubbies

  • 05-30-2013 8:01 AM In reply to

    • GT1
    • Top 10 Contributor
    • Joined on 09-26-2008
    • Posts 934

    Re: New Cervélo, in between sizes, which one to choose?

    wayne:

     Body build is an important consideration. A small bike frame set up for a correct reach and seat height will flex more under load with a heavy rider. A lonver stem and seat post extension adds leverage to the riders weight and strength. Conversly, a light rider on a larger frame will stress the frame below the design and will feel rigid and dead.

     If possible, ride them both.

     

    +++1

     

  • 05-30-2013 10:09 AM In reply to

    Re: New Cervélo, in between sizes, which one to choose?

    Both of these frames have 700 C wheels. That is not a factor for you. Where the frames really differ is the head tube angle (they have the same fork rake) and the stack (which is a 25 mm difference). The reach difference is only 9 mm which can be taken up easily in short reach bars or a stem change. If you can handle the difference in stack (this is usually my limiter personally) then you will probably want the smaller frame since the fork rake and head tube angle offset each other more to solidify the handling (i.m."rarely"h.o.) and it will put your butt farther over the rear tire and keep the back of the bike planted. It will also give you more stand over height (crotch clearance is always a good thing). If you do go with the smaller bike you should be sure to check that the biggest water bottles you want are fit to use in the frame, this can be a problem with smaller frames. After the fit you should check the toe overlap on the smaller frame. There is not a problem even with toe overlap for most riders in most situations but be sure you are comfortable with it.
Page 1 of 1 (15 items)
Copyright © 2007-2013 Cervélo Cycles Inc. All rights reserved.