Join Date: Jun 2005
Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
Bikes: Specialized Tarmac, Speialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 01 Bianchi Campione, 87 Centurion Ironman, 92 Paramount
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I made this change to a 2001 Specialized Hard Rock Sport and I asked this forum and the mechanics forum for input. One comment that was made is that the actual sag on the larger fork will probably be more than the sag on the 80mm fork. So the true difference between the forks may be less than 20mm. Most posters felt that this was too small a change to be a concern. But I think you should keep an eye on the headtube and watch for cracks after you make the change. If you see a crack, don't take that bike out again. As for handling, I went from a 80mm Suntour SR 6200 spring fork in fair condition to a 100mm Manitou Axle (with rebound control) in great condition. All I could tell is the bike seemed to handle better with the better fork. I gave this bike to my son who had previously been riding a Trek 820 and he really liked the Specialized. So I don't think the new fork will have a negative affect on your bike.
One last comment, we do not do big jumps on our bikes. most jumps are under one foot.
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