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The Bike Fit Academy

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1 contribution to The Bike Fit Academy
What's more important, stack or reach?
Morning BFA hive mind... I'm in the process of thinking about buying a titanium frame to scratch an itch that I've had for years. The frame I'm considering is a Kinesis GTD v2. Now I currently ride a 56cm Trek Domane SL and AL which are exactly as they came out of the shop, save for saddle height (757mm), setback and bar rotation. I've looked at 54cm and 56cm in the GTDv2. The 54cm is 20mm shorter in stack and 12mm longer in reach. I'm using all the headset spacers on the Domane and a 100mm stem. That 12mm could be compensated for with a 90mm stem. The 56cm is only 6mm shorter in stack, but it's 19mm longer in reach, which if the bars I use are equal then it might be just a case of using an 80mm stem? I think the 56cm GTDv2 is going to be the right size, but I'd appreciate folks thoughts. https://bikeinsights.com/compare?geometries=65eb79c5160457001baecfd7,61961a36a1db440020ec92ab&builds=6a2c0128224334001b538d1b
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Robert Newton
1
5points to level up
@robert-newton-4268
Recreational cyclist, looking to increase distance and comfort.

Active 1d ago
Joined Jan 17, 2026
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