owen. wrote:
So after much deliberations it's down to two bikes, neither of which I can ride before hand. The Focus Mares AX 1.0 and the aluminum Niner RLT9 (built from a frameset to similar spec as the Focus). I'm looking at 56 in both... how big a difference is that half degree difference in seat/head tube angles and extra 1cm of chain stay and 15mm of wheelbase going to affect handling?
On tighter trails, I find my Kona Jake the Snake tends to push wide... It has the Mares short stays and wheelbase but the RLT9's slacker angles so if I want a more nimble bike go with the Focus and if I want more stable go with the Niner?
I have a lot of gravel riding and racing experience, and have tried a few bikes with different setups. As mentioned earlier, a lot depends on the kind of terrain you are riding and your riding style/skill level.
I personally find there to be little use for any tread when riding gravel roads. The rougher and looser the conditions (and the speed you'll be travelling) should push you to larger volume tires. I use the aluminum disc version of the specialized crux, and I've found it to be a very good bike for gravel and mixed condition riding in my area.
For smoother condition races, I'll use 32mm slicks, a little rougher then the 38mm tires are used, and if it's really rough, then I'll use my 650b wheels with 42mm tires.
My favourite setup is actually the 650b wheels with 42mm tires. The ride height of the wheels are the same as a 700c wheel with 25mm tires. The handling is quick and nimble more like my road bike in this setup - and you get the bonus of the high volume.
As far as geometry goes, I prefer cx race geo - 425mm CS, 70bb drop, and a trail value in the 60-63mm range. I find bikes with slack angles feel sloppy in this format.
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