Reply To: New fork for my Rockhopper

#206294

Most bikes do well being “overforked” by 20mm, and you should generally stop there (for geometry and warranty/frame strength reasons).

Roughly every 20mm increase in fork length (A2C) will slacken the head tube angle by 1 degree, lengthen the wheel base (front center, really) by about 7mm, and raise the bottom bracket by about 7mm. The slacker HTA will will be the biggest handling change, slowing steering inputs and providing more stability at speed.

After you make the change, you’ll probably feel it on the bike for the first 20 minutes of riding, then your brain will readjust, and it’ll feel completely normal. I wouldn’t expect any problems.