Does your saddle shape determine your offset?

[RoboLuke]

OK...so here is the deal. My knees are about 4 cm too far forward. The bike size and the crank size is spot on according to loads and loads of reading I did.

My brother in law is on the same bike (size) and 4 cm taller than me and his offset is perfect. So either im out of proportion (Afr: Gebreklik) or what people?

 

The dam saddle is to high already I need a box to mount the bike. God forbid I moer off.

 

Is it possible that my bum is too big and cant move far enough back? Or that the sadle(s) shape prevents me from moving back? (go slow on the fat jokes now Im not fat just big boned. And big muscled for those who is hard of learning)

 

OR what else can it be? (its a 29er)

 

Im getting a 2nd 'pro' setup later this week but Im open to ideas.

[Guest agteros]

Knees 4cm too far forward? According to the UCI, or who?

[gummibear]

What seat post are you riding?Zero offset or 2omm

 

Post a pic of your bike and see what the set up looks like.

[Dubber88]

Also depends on the leg to upper body ratio( not that there is necessarily such a thing) between you and your BIL.

 

Maybe his legs are a bit shorter than yours?

 

Offset is also a possibility.

 

More Info!

[LazyTrailRider]

OK...so here is the deal. My knees are about 4 cm too far forward. The bike size and the crank size is spot on according to loads and loads of reading I did.

My brother in law is on the same bike (size) and 4 cm taller than me and his offset is perfect. So either im out of proportion (Afr: Gebreklik) or what people?

 

The dam saddle is to high already I need a box to mount the bike. God forbid I moer off.

 

Is it possible that my bum is too big and cant move far enough back? Or that the sadle(s) shape prevents me from moving back? (go slow on the fat jokes now Im not fat just big boned. And big muscled for those who is hard of learning)

 

OR what else can it be? (its a 29er)

 

Im getting a 2nd 'pro' setup later this week but Im open to ideas.

 

Stop worrying and just ride.

 

Sure, having a comfortable position is important, but everyone's different.

 

Some of the fastest people I know (some of them ex-pros) have never in their lives even seen what "fitting equipment" looks like. "Need a box to mount the bike"? No no no!

[RoboLuke]

OK more info...ps - My knees hurt so that is the main driving force here.

 

Im 174 cm tall. My leg is 79 or 80 cm if the wife measured it correctly. My bike is a 17.5 inc which apparently is correct for MTB

Crank is 175 mm

My current seatpost offset is 12 mm

My saddle is as far back as it can go

No I dont realy need a box to mount the bike but I though that was funny :-)

 

With all of this the front of the knee is about 4 cm in front of the spindle ax...where minues 1 cm would be better

[TNT1]

What exactly do you mean by offset? Oh, and in that one pic here, the saddle shouldn't be pointing down like that in the front. You gonna get sore nuts and sore shoulders from that.

 

Oh, 4cm in front of the pedal axle? You should be directly over it. Push the saddle back on it's rails, and keep it level with the ground.

Edited April 20, 2011 by TNT1

[Nimby]

Instead of doing it yourself, how about heading to a (reputable) LBS who can look at all the variables and have experience of fitting?

[TNT1]

Instead of doing it yourself, how about heading to a (reputable) LBS who can look at all the variables and have experience of fitting?

 

Bollocks man. It's a money making thing. Do it yourself. Bike setup is not some intricate "black art". It's based on a handful of measurements and principles.

Edited April 20, 2011 by TNT1

[The Drongo]

You need an offset seatpost. The rails of your saddle should be [roughly] central to the seat post rail clamps.

 

That saddle is also fairly 'full'. Try a saddle with a little less 'fat-ass'.

 

For everyday riding and XC your saddle should be level ('what TNT1 says may be true"), as in bike on level ground, and saddle level from nose to sit area.

 

Your head stem is long enough.

 

If your hips 'rock' from side to side when your foot is at the six o'clock position in the pedal stroke, then your saddle is too high.

 

Knee pain can also be caused by incorrect cleat positioning.

[AndreZA]

That bike looks really compact. I don't thing a bigger one that will be longer will help. Maybe you've just got very long femurs. Try and get seatpost with as much seat/layback as possible. Look at FSA or Easton.