Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    Newbie
    Join Date
    Jun 2007
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Cervelo Sizing Help!

    I'm looking to buy a Cervelo Dual in the next couple of weeks, but am torn between the 51 and 54 size. I'm 5'8" with a 30.5" inseam. According to bike-fitting websites I've found, I should be looking at a 51.9cm frame size. The Cervelo seat tube adjusts b/t 74 and 79 degrees, which means that the 51 size would fit me at a 75 degree angle (53.5 cm top tube length at that angle). However, I've read that the steeper the seat tube angle the better so keeping it at 79 degrees is preferred. The 54 size at 79 degrees yields a 53.0 cm top tube length.

    Does anyone have any experience fitting a Cervelo that might be helpful? Should I go for a smaller frame size and adjust the seat tube accordingly? Or should I go for the larger frame size? Thanks!

  2. #2
    It is fantastic. voltman's Avatar
    Join Date
    Aug 2005
    Location
    The OC
    My Bikes
    05 Specialized Allez Elite; 06 Fuji Team Pro
    Posts
    7,978
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is that a "true" or pants inseam?

    Off the bat, I'd say 54.

  3. #3
    Senior Member
    Join Date
    May 2005
    Location
    North Bend, WA
    My Bikes
    Cervelo Soloist / Cervelo P3
    Posts
    480
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'd look here: http://www.slowtwitch.com/dealersurvey/fistcoaches.html to see if there are any shops near where you live with experience in fitting tri bikes.
    2007 QR Lucero
    2005 Cervelo Soloist

  4. #4
    Member
    Join Date
    Dec 2004
    Posts
    35
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Size 51

    I have a cervelo as well.

    I'm also 5'8 with a 30.5" inseam (it's true!).

    My road bikes are all 54's

    My Cervelo is a 51, and fits like a glove.

    Go to a qualified bike fitter and test ride the 51 properly setup, you'll be surprised.

    Enjoy.

  5. #5
    Senior Member
    Join Date
    Sep 2005
    Location
    Dallas, TX
    Posts
    293
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm with everyone else. Find a shop that carries them. Make sure they have one in stock before you drive too far, and go get fit. Most shops will order a size in if they don't have it for you to try.

    I'm 5'11". When I was test riding tri bikes, I was riding on a 54 p2sl. I ended up buying a QR, but the 54 Cervelo would have worked for me.

  6. #6
    i believe in me evanyc's Avatar
    Join Date
    Oct 2004
    Location
    Brooklyn
    Posts
    2,712
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    yeah, if you're spending enough money to buy a cervelo, the shop should give you a proper fitting.

  7. #7
    Senior Member
    Join Date
    Jan 2006
    Location
    Australia
    Posts
    1,461
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    If you are between sizes, I'd suggest the smaller of the two sizes for TT frames.

    But as everyone else is saying a sizing by a good fitter is a worthwhile initial investment prior to purchasing.

    I ride 56-57cm road bikes (183cm tall - 86cm inseam) and have recently bought a 52cm Alloy P3 which I am currently building up. I was sceptical about going that small, as the general rule of thumb is to get a top tube ~2cm down from your road bike. But I went and borrowed a friends 52 cm P3 (who is identical in fit) and went out on a 60km training ride on the bike. Note though I am still pretty flexible in the back and hamstrings so can ride more aggressively...

    The smaller frame and forward position is also fine for me for Tri's and TT's. As I don't race under UCI rules, so am not restricted by UCI rulings in regard to seat position behind the BB. Which would be near impossible to meet with the extra small frame and forward seat position.

  8. #8
    Senior Member
    Join Date
    Jan 2006
    Location
    Southeast Michigan, USA
    My Bikes
    '05 Klein Attitude V, '90 Bridgestone MB-5
    Posts
    273
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have a P2SL (very similar to the Dual) and it is a 54cm frame. I'm 5'-9" with a 30" pants inseam (short legs, long torso). The bike fits me extremely well and I have the seat in the forward position.

    There is so much to fitting a tri bike... go to a good shop in your area. If you live in Michigan or northern Ohio then I would highly recommend BikeSport of Michigan in Dearborn. Tom Demerly is very experienced and you will not go away without a proper fit.
    - tom

    Family, Cycling and Photography --- life is good!
    '07 Cervelo P2 SL
    '06 Kestrel Talon SL
    '05 Klein Attitude V

  9. #9
    Body by Guinness cjbruin's Avatar
    Join Date
    Nov 2004
    Location
    Irvine, CA
    My Bikes
    Specialized Allez Pro; Cervelo P2 SL; Tsunami (Converted to Fixed Gear)
    Posts
    3,326
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Run1stRide2nd
    I have a cervelo as well.

    I'm also 5'8 with a 30.5" inseam (it's true!).

    My road bikes are all 54's

    My Cervelo is a 51, and fits like a glove.

    Go to a qualified bike fitter and test ride the 51 properly setup, you'll be surprised.

    Enjoy.
    I had to double check to make sure I didn't make this post. 54 roadie and a 51 P2 SL
    Fredo, you're my older brother and I love you...but don't ever take sides, with anyone, against the family again...ever.

  10. #10
    Member
    Join Date
    Dec 2004
    Posts
    35
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yup...........I have the P2SL as well!

    Funny.

    I do love the bike, and its FAST!

  11. #11
    Body by Guinness cjbruin's Avatar
    Join Date
    Nov 2004
    Location
    Irvine, CA
    My Bikes
    Specialized Allez Pro; Cervelo P2 SL; Tsunami (Converted to Fixed Gear)
    Posts
    3,326
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Run1stRide2nd
    Yup...........I have the P2SL as well!

    Funny.

    I do love the bike, and its FAST!
    Hmmmmm. I didn't get the fast version. Bummer.
    Fredo, you're my older brother and I love you...but don't ever take sides, with anyone, against the family again...ever.

  12. #12
    Newbie
    Join Date
    Jul 2007
    Location
    Canada
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm in a bit of a predicament. I really want to order a Cervelo P2SL but there are absolutely no local shops even close to me that sell Cervelo and the one that is closet isn't being all that cooperative with assisting me.
    I've used the competivecyclist fit calculator and compared results to Cervelo's geometry tables and I'm still not positive which size I should be purchasing.
    I'm 6' with a 35" inseam. I fully realize the best thing for me to be doing is getting properly fitted but it just isn't going to be possible.
    If anyone could recommend an on-line shop that I should deal with and a suggestion for Cervelo size, I'd appreciate it.
    Thanks!

Posting Permissions

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