Due to some unforseen problems cant now get the 100mm forks i was after
looks like ill need to stick to the 120mm i have just now for the new frame its designed for 100mm
my question is what problems will this cause,do i increase the sag,longer/shorter stem
If they're air forks you can reduce pressure to give increased sag, but in my experience it ain't ideal.
It will break and you will die. This is a fact*.
*May not be actual fact.
The issue is primarily the extra force the forks will place on the frame head tube as a result of being a longer lever than 120mm forks. I wouldn't worry too much about the impact on handling although you might want to lower your bars to put them back in the same position as they would have been on a 100mm fork.
All this assumes the axle-to-crown length on the new forks is 20mm longer than the ones you were originally after.
Depends really on your style of riding. It will slacken the head angle by about a degree (iirc) making the climbs a little harder (just get your weight over the front a bit more) and the descents waaaay more fun 😀 .
I think you'd have to go some to break the frame - although the warranty might be in question if you did. The handling will definitely be altered though, sorry to contradict. The steering will be more ponderous, especially going up hill. Personally, I like a bike that goes where you point it.
Descents more fun? I don't get this current obsession with slack bikes. For normal singletracking (which usually includes corners) a bike with good responsive steering is much better.
Re the handling, the extra fork length is less than an inch and I assume the OP would have more sag on 120mm fork than a 100m fork, so we are probably talking about 1/2 an inch longer fork once he is sat on the bike. Personally I don't think I would notice too much difference in handling (I didn't when I ran my Rebas at 115mm rather than 100mm on my old Tinbred anyway - with the same sag)
I am quite insensitive about bike set up though 😉
What forks and what frame are we talking about here?
as above but will also shorten your effective top tube and raise your bottom bracket height a tad.
handling may also be worse off.
Hi jfeb
Dialled love/hate frame
Manitou minute forks
i aint exactly a hucking kinda guy
depends. It's more about the length of the fork rather than it's travel, TBH. If you're sensitive to these things you may notice, but TBH you'll soon get used to it.
Until very recently I used to run the following:
Classic XC blur (100mm) with 150mm forks and a longish stem.
Inbred (100mm) with 125mm forks and a very short stem.
Going uphill the bike is a bit harder to keep where you want it, but it's not something you really notice after 20mins of riding or so, I tend to find myself sat at the front of the saddle keeping the front/rear balance when doing savage/tricky climbs.
Downhill is a lot more fun, as you don't have that nosedive feeling.
I'm 16 stone and I took the blur to the alps, wales and dark peak without any problems - well that's a lie, the bearing don't like the irish slop I usually ride in but thats down to it being californian.
Couple of pics of my Tazer [url= http://mamadirt.fotopic.net/c1553419_13.html ]here.[/url] One with 100mm Minutes and one with 120mm Minutes (frame is designed for 100mm forks but until upgrading the forks I had quite happily run 130mm Marz Drop Offs). Swapping to the 100mm forks it felt like a rocket but definitely caused more than a few 'new shorts' moments on the drops. I much prefer the 120s - definitely a bit more work on the climbs but as I said I prefer the downhills anyway.