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Advice on fork upgrade

Old 08-19-10, 06:51 AM
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sampath06
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Advice on fork upgrade

My friend has an Orbea Tuareg (https://www.orbea.com/en/bicis/modelo...ficha_tecnica/) which has a 50 or 60mm fork. He wants to upgrade it to a Rock Shox Tora SL 100mm coil fork. Will it be compatible with the bike. What are the things to check before upgrading the bike.
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Old 08-19-10, 06:55 AM
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Going from 50-60mm to a 100mm fork isnt a good idea. That will raise your front end too high and increase your head angle. If I had a frame like that I would look for a nice carbon rigid fork!
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Old 08-19-10, 11:10 PM
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Originally Posted by Hou-Tex View Post
Going from 50-60mm to a 100mm fork isnt a good idea. That will raise your front end too high and increase your head angle. If I had a frame like that I would look for a nice carbon rigid fork!

Thanks for the reply. Regarding geometry, I was looking at another Orbea model (https://www.orbea.com/en/bicis/modelo...ficha_tecnica/). This has the same frame build and geometry as the Tuareg. So would upgrading to a 100mm fork on the Tuareg still be an issue?
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Old 08-20-10, 02:41 AM
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Hi, I'm the aforementioned friend. Just signed up, will introduce myself in the forums soon.

Anyway, thanks for the reply. I'm still in the process of dialing in my fit, since the handlebar is just a bit too far from me, and my posture a little too agressive for my tastes. I was considering changing to a shorter stem, but the head angle increasing may actually work in my favour, right?

Also, a carbon fork may not be necessary, since I'm planning on picking up a steel tourer for my real rides by next year. I plan to use this as my commuter and for recreational trail-riding.
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Old 08-20-10, 07:28 PM
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Should be absolutely no problem running a 100mm fork on that frame, in fact, it'll probably improve the ride quite a bit.
I run a hardtail with a 100mm Dart 2, the bike originally came with a rigid fork. Huge improvement.
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Old 08-21-10, 08:40 AM
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I put a Bomber coil of some sort on my wife's hybrid to help turn it into a MTB. I don't remember the exact travel; something on the order 0f 120mm to 150mm.

It laid back the head angle some but it worked just fine. Dialed in a little more sag to keep it from being too chopper-like, repositioned the seat to account for the change in seat post angle, and Bob's Yer Uncle.

It's a compromise adding more travel to a bike that wasn't built around it, and there are limits (an 8" dual-crown would not have been viable) but you can ride and tune around small changes.

I'd put a 100mm for on that bike, no problem.

Biggest thing to watch for is the fork steer tube height. If the frame has a tall head tube and the fork a short (or cut down) steer tube it might not fit. Otherwise, go to town.

DG
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Old 08-22-10, 07:34 AM
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Thanks, that's encouraging. I had expected to do the same thing; work around the changes in geometry. I feel reassured now. I'll be fitting a friend's 100mm to see how it feels first, though.

Also, thanks for the heads up on the head tube recce, I'm ordering online, so every tip helps.
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Old 08-22-10, 07:41 AM
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The 100mm Tora will work fine. If you don't like how it feels, you can custom tune it to 50-60mm travel if you wish using home made "All Travel" spacers. What you need to be looking at instead of fork travel is the A2C measurement of both forks.
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Old 08-23-10, 01:55 AM
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@chelboed: That makes sense. I'm moving from 445mm (I just measured it) to 470 mm. I'm expecting a slightly relaxed steering response, but that may just be a good thing.
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Old 10-21-10, 07:15 AM
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Did it a month back, and the bike took it well.
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Old 10-21-10, 08:06 AM
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Where do folks get all of this " don'd add a longer travel fork" crap. If you know what you want and why you want it it's no problem.
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