About 6 weeks ago I was riding my ’86 Trek 310 ,
and got hit by a car at about 40-50 MPH, as it crossed into my lane coming around a curve. – (It was sort of a side swipe really, but the car still had to be towed because I blew out the left front tire, tore the outside mirror off and pushed the fender back into the driver’s door jamming it shut). My bike fared pretty well – the front wheel zipped by the car without ever making contact, and the only apparent damage to the bike was a twisted handle bar, and a pedal that was torn out of the left crank. . . Or so I thought . . .
After the accident, I brought the bike to my LBS for an estimate. The mechanic verified that the frame was not bent using the frame gage, and since the Insurance was paying, I decided to have them effect the repairs, and do a general tune up.
When I got the bike back, it looked good as new, but when I got to riding it, I found that the bike mysteriously pulled to the right.
I went to the bike forums immediately for an answer, and found a thread that described a case where a pair of fork blades had not been bent back, but had been displaced laterally about ½ inch, causing the bike to pull right.
Straightening bent fork blades
I went into the garage and using a bicycle plumb bob (made from string and a broken presta valve) I saw that my bike ALSO had both fork blades laterally displaced ½” to the left.
I then made a crude alignment gage from a 2 by 6 and two U-bolts, establishing a centerline with a known, good fork, and my laser level.
Next, I gradually bent each of the forks to perfectly align +/- 50 MM to centerline, using a small square, and a section of PVC pipe, (See pics)
I reassembled the bike and tested it. No improvement!
I verified that the front and rear wheels where true and centered between the stays.
I verified that the front and rear axles were seated in the dropouts, and the QR’s secured.
I verified that the headset bearing cages were lubed, and not installed upside down.
I replaced the old caged bearings with 2 new bearing cages ( I am all out of loose ball bearings)
I verified that the headset was properly adjusted, without excess play or binding.
I added an additional spacer in the head set, just to be sure the headset nut was not bearing down on the threaded tube.
STILL no improvement! The bike pulls right.
I don’t know what else to do. Is there something I am over looking? Any suggestions are appreciated.