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knees hurt after bike ride after i bought a new bike other bikes dont do it.

my knees hurt after I ride about 12 miles. My knees never hurt. I ride about 2,500 miles a year min. I bought 2 new bikes this fall. One mt bike and one fitness bike. The mt. bike does not hurt The fitness bike does. It’s a trek 7.4 FX with disk.

We have done everything there is to do as far as fitting me to the bike. We are going to put an adjustable stem on it next. But here is something to think about.It only hurts my left knee most of the time.And it only hurts around the knee joint not in the knee or knee cap. It is very mild.And only hurts after a bike ride.

I had a bad sprained ankle 3rd degree on the right foot. I tore something in there.It’s been 2 months and biking don’t hurt it. but I am wondering if I am not putting more pressure on the left leg to compensate for something that I can’t feel. Really it does not hurt my ankl;e at all.Eventhough I am not 100 % I can ride. Why is my knee hurting around the knee and on top where the tendon incerts at.It has never done this before.

There’s alsomthing I might want to add. Trek goes from 17.5 to 20.0 in sizes nithing in between which leaves ahuge gap in between. I normally take a 17.5. Is this the bike doing this. It’s mighty funny my other bikes don’t do it.

I really like this bike.Please give me some in put on whats going on ok.Thanks.

4 Replies

not2old, January 8, 2014 at 5:30 pm

When I had a slight pain in one knee it turned out to be a slight misalignment with my cleat on the one shoe & pedal. If you’re using platform pedals maybe you’re adjusting your foot to compensate for your ankle sprain. The differences in the bikes such as gearing, crank length, position along with pedals may just be enough of the difference to exploit your pedal positioning.


Davy Sprocket, January 9, 2014 at 5:47 am

Sure seems like a set up issue. I would have someone video tape from behind and the side to analyze your posture and stroke. The slight change in seat height, top bar length, Stem length etc. can put things out of whack. Also, make sure you are saddled correctly (evenly). You may be favoring to one side to compensate for the ankle sprain unconsciously trying to lessen the pressure on it.

Just a couple ideas. Good luck!



seminole11, January 9, 2014 at 10:11 pm

Yea, I took my bike to the bike shop for the second time. Today we put the gauges on it. We have my saddle height at 32% , and the for and aft is right in the middle of the spindle.

We also put an adjustable stem on it. And I think this stem will really help. the bike feels really good with this stem on it.sorry I logged in with my other user name. I am prince page same person. For some reason it would not let me log in with my new user name.


Davy Sprocket, January 10, 2014 at 5:41 am

Glad to hear you are on the right path Seminole. I hope that cures your issues, because knee pain sucks.



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