Mongoose is about six years old.. still has a great ride, but the rear brake spring is missing, and LBS guy thought I should "upgrade" to a lighter, more modern bike instead of paying to have the brake fixed.

I've fiddled with the Trek's seat suspension.. maybe that will help.. but geez, that old Mongoose sure is comfy and seems just as fast.

Most of my rides are 20 miles or less..

Thanks..