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I'd like to replace my tektro calipers on my Defy with a sale set of 105 calipers. Thing is, they come with a warning about leverage ratio at the lever - so can I use 105 calipers with Sora 3800 (I think - the 2013 sora which is paddle only) STI's?
I think you need to give the model numbers and hope MisterP comes along and supplies an answer.
Even within the 105 range different model years had differing leverage ratios.
I ran the opposite, new levers with old callipers and got a quite on / off feel with short lever travel. I would imagine using new callipers with older levers would give the opposite.
IIRC, 5800 calipers with 3800 Soras should work. It's the x800 thing that matters.
I can't find the sora model number. It's 2013, paddles only so no thumb button, and 9 speed - anyone know?
There is no 3800 Sora, current model is 3500 which is "old" cable pull and is 9 speed with two levers rather than the little thumb knob.
You won't die using this combination.