Parkpre frame question

[caemis]

Yup, exactly. In your case it shouldnt be more than 42.5cm for a rigid fork. You may go with more but this will affect the handling/steering...

 

[alainbriot]

Retro Guru said 440mm. Are you saying 425mm is best?

 

[caemis]

IMO 440 or slightly more used to be the a-c for the mid to late 90s xc suspension forks. 425 is the usual suspension corrrected length for a rigid one. But of course I can be wrong and you can.ride the bike with 440 as well - it may just ride different and not.necesseraily better

 

[alainbriot]

So to recoup, if I understand this correctly, when replacing a suspension fork with a rigid fork, I need a rigid fork with a longer than normal axle to crown distance to compensate for the suspension fork travel distance. From what I have seen, regular rigid forks, i.e. for non-suspension frames, have an axle to crown distance around 390mm, which is 4 to 5 cm less than what is needed to replace a suspension fork.

 

[caemis]

No no, if you replace a suspension fork you have to compensate the SAG of the suspension fork in the first place, i.e. ~25% of travel = 1.5-2cm in case of the 63-80mm travel.

That means, a suspension fork with 440mm a-c and approx. 80mm of travel= 424mm...

 

[66 triumph daytona]

Re:

What he said.

 

[alainbriot]

I understand. So now the question is where to find a rigid for with 425mm axle to crown distance for 26" wheel size, cantilever brakes and 100mm hub spacing... any suggestions? I've been looking but no luck so far.

 

[caemis]

Wait, 135mm hub spacing? Did I miss something?

 

[alainbriot]

Sorry, 100mm. I corrected it. Confused front and rear hub width.

 

[caemis]

There are indeed 135mm front hubs for fat bikes but ok. The easiest was to get a matching fork is to place an add over here: viewforum.php?f=3

Good luck

PS: Keep in mind to determine if you need a threaded or threadless steerer