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So after I got a new fork back in December, I hired REI to do it as it was covered by my warranty. However, they gave me a crappy coil fork with so little adjustability it’s insane. I’m very light, so being able to adjust the sag so that I can have some form of shock absorption on the front of my bike is important to me. I’ve been looking on pinkbike at used air forks, and I’ll probably pull the trigger and buy one sometime soon. However, I have no idea what specs I have to look for to make sure the fork is compatible with my bike. I know wheel size is important (I’m running 27.5″), but that’s about all. I don’t think my wheels are through-axle as they’re the type with quick-release on the ends and the little inlets that they nest into..? I think that’s through bolt. Anyways, my frame size is large, but that’s pretty much all I know. If anybody out there could tell me the things that I need to look for to make sure the fork will fit my frame, that’d be great! Thanks!
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You’ll need to get a fork with the right steerer tube size. Check your manual or the manufacturer’s site for your ST length. They are usually 1 1/8″ or tapered. If you don’t have the right steerer, your new fork will not fit-that’s probably most important. I’d also try to get a fork with the same amount of travel. Too much or too little could affect the handling of your ride. You’re right about wheel size and as for wheel configuration if you have quick release wheels, (sounds like you do) it’s probably best to make sure the new fork can be fitted with that type of wheel. I’m not sure if they’re universal but I’m sure others have more to say about that.
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If you added a link of your bike we could help you a bit more!
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http://mountain-bikes.gearsuite.com/l/9583/2015-Ghost-Kato-3
With the new fork it has 140mm of travel. (RST Blaze 140mm).
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The link that you provided says your bike comes with a 120mm travel fork. So depending on your trails, if you bike is climbing well with 140mm, then I would recommend staying with 140mm. If it is climbing poorly with the 140, then you might want to go with the 120mm that appears to be stock for the bike. Do not go higher than 140mm to protect your frame and stay within the design of the bike. I’m guessing you probably can’t go higher than 140mm anyway. I don’t think I have ever seen a 150mm or 160mm non-through axle fork, but maybe that’s just due to my limited experience. Would be a bit of a scary concept imo. =) Wish I could help you by recommending a specific model, but I just don’t have experience with smaller forks.
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You need to get the correct axle to crown length. Ghost (or REI) will give you this measurement, if you don’t already know it. If you get a taller fork, you’ll end up with a bike that looks like a Big Wheel. Not an ideal situation.
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