Yes, dropping 35 mm of length will mess with the bike's handling.
Don't be overly specific in your search. Try looking for a carbon 29er fork. I bet it has about the right axle-crown length. 505 or 507 would be fine. Really, +/- 10 should be okay. But not -35.
You could just buy the matching Kona fork. I bet Niner's carbon fork is about right. If you don't mind steel, there are a ton of nice options. Are you more driven by price or by getting to put some carbon on your bike?
Im good with brakes, BB, crankset etc but the front end is a bit confusing.
integrated, internal,threadless headset etc. Read up on it and Cane Creek has some good info but looks like Ill need help from LBS as far as headset as I suppose without proper press I'll mess things up.
I could just ask LBS to get me a good fork but I want tolearn on my own if possible.
Just cannot find a 505 fork. I may contact Kona about this.
Lots to learn but I'm getting there.
Any suggestions are appreciated. Just when I get ISIS, GigaX, square taper and JIS figured out I get the front fork curve ball thrown at me !
I think you will find that 506mm is the AC of a 100mm Fox suspension fork.
Assuming it is sagged the usual 25%, that would be a AC of 481. 30% would be 470. The usual 29er rigid forks should work fine.
505 to 510mm axle to crown = a 100mm suspension fork
Around 490mm axle to crown = a 80mm suspension fork
I've seen 80mm suspension corrected rigid forks with listed axle to crown of 465 to 470mm
I've seen rigid forks listed as 100mm suspension corrected with a axle to crown of 470mm
Whisky Parts have a rigid carbon fork with 480mm axle to crown.
White Brothers have a rigid carbon fork with 490mm axle to crown.
If you're riding a 100mm suspension fork with the sag set at 20% it'll have a axle to crown length of 485 to 490mm, you won't be riding it with the fully extended length of 505 to 510mm
If you think about the bike's geometry, when you increase the length of the fork, the head tube angle is going to be increased. Say it's at 67º now, a lengthier fork could quickly turn that to 64º. Doesn't seem like much, but your turning will feel less responsive and the balance is going to be a little awkward, especially at higher speeds.
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