Need help with bike frame sizing
05-13-18 | 04:20 PM
#1
Thread Starter
Senior Member
Joined: Sep 2014
Posts: 595
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From: Southern California
Bikes: Bianchi Oltre XR4 Celeste, De Rosa SK Pininfarina, Giant TCR SL, Giant Revolt Advanced Revolt 0 Gravel Bike, Trek Madone SLR, Cervelo R5 Disk
Need help with bike frame sizing
I'm about to order a De Rosa SK Pininfarina frameset and need help with sizing. The reference is my Bianchi Oltre XR4, size 50, 100mm stem. The Oltre fits me like a glove. Posted below is a screen capture of the geometry of the two bikes. I'm leaning towards size 50 for the De Rosa. Let me know what you think. Thanks!
05-15-18 | 05:42 AM
#2
Senior Member
Joined: Oct 2010
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Size 50 De Rosa should fit almost exactly the same as your Bianchi with a 100 mm stem and with 15-20 mm of spacers removed, assuming you are using a -6 degree stem and more than 20 mm of spacers on the Bianchi (conical top cap included). Alternatively you may need to use something like a -17 degree stem on the De Rosa, which would actually look quite good with the flat top tube of that frame.
Last edited by Fiery; 05-15-18 at 05:45 AM.
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