Neg Posted April 23, 2012 Posted April 23, 2012 I recently got a new anthem, (bought a complete bike, not built up) with an 90mm stem. My old Anthem had a 100mm stem. here is the issue. the new anthem is a 29'er, with the Giant connect stem. my old anthem was a 26'er with 100mm KCNC stem. i have noticed that the 90mm stem makes the front wheel too far forward, this could be because of the larger wheel.? i have a very close riding position from saddle to end of stem and i was thinking that if i put a slightly longer stem on the 29/er this might help the wheel forward feeling. so i stripped the 90mm stem off and tried the KCNC.... only to find that the KCNC stem is too narrow to fit over the fork stem...?? i measured the fork stem and it is 31.6mm while the KCNC Stem is 28.7. i did fit my other SID and fox fork i had on the 26'er...... now im wonder if giant have not had the fork made specifically for the anther 29'er ( as i mentioned i bought a full bike) and it has the original stem and slight riser bar on. even the riser bar is too big for the KCNC stem. ?? am i missing something here?who makes a decent 100mm stem that is 31.6mm and will take the Giant bar? or will the bar need replacing too?? thanks.
TNT1 Posted April 23, 2012 Posted April 23, 2012 Bugger the wheel size. Is your position setup according to the measurements taken off the old bike?
Neg Posted April 23, 2012 Author Posted April 23, 2012 not exactly, if i do that then my riding position moves further back and my legs then pedal "in Front" of me and i dont have the direct down pedal. its like im kicking the air in front of me! i have moved my seat forward and this has brought the position closer.... and i have a much straighter down stroke. what i have noticed is that my lower doesn't get sore anymore since on the 29er... well it does, but only after about 50-60km. both bikes are mediums! im 1.84m tall. im comfortable as i am, kind of, im just thinking that if i move forward 10mm on the stem i might have a bit more "direct" steering through the single track as at the moment it feeling almost like im riding a reign with the wheel forward geometry...
davetapson Posted April 23, 2012 Posted April 23, 2012 Dude, go get a bike set up. Sounds like even a bad one will be better than what you've got.
TNT1 Posted April 23, 2012 Posted April 23, 2012 not exactly, if i do that then my riding position moves further back and my legs then pedal "in Front" of me and i dont have the direct down pedal. its like im kicking the air in front of me!i have moved my seat forward and this has brought the position closer.... and i have a much straighter down stroke. what i have noticed is that my lower doesn't get sore anymore since on the 29er... well it does, but only after about 50-60km. both bikes are mediums! im 1.84m tall. im comfortable as i am, kind of, im just thinking that if i move forward 10mm on the stem i might have a bit more "direct" steering through the single track as at the moment it feeling almost like im riding a reign with the wheel forward geometry... Stands to reason, you moved the saddle forward, so you'd want to move the bars forward to compensate?
Neg Posted April 23, 2012 Author Posted April 23, 2012 Yes. because as i mentioned, if i move the seat back them i kick the air in front and lower back gets sore quickly. the position i have now gives me a comfy down stroke, but just feel if i moved a bit forward i might gain a bit more nippy control. ??? hence my question about stems that will if the 31.6 stem of the fork.
deanbean Posted April 23, 2012 Posted April 23, 2012 You'd get more nippy control with a shorter stem and wider bars.Check your old bike, I bet it had narrower bars.I'd get someone to look at your setup.
TNT1 Posted April 23, 2012 Posted April 23, 2012 I'd get someone to look at your setup. And you're in midrand. Go see Dangle.
BLACKvoodoo Posted April 23, 2012 Posted April 23, 2012 how do you know if your stems too long? I get the feeling my front wheels under me when I ride.
deanbean Posted April 23, 2012 Posted April 23, 2012 Both my wheels are under me when I ride. Mostly.Me too, except when I'm under them
TNT1 Posted April 23, 2012 Posted April 23, 2012 Me too, except when I'm under them Been taking riding lessons from weedmod?
deanbean Posted April 23, 2012 Posted April 23, 2012 Been taking riding lessons from weedmod?No only met him once, and he was drinking too much beer, or cramping too much to give me lessons, besides, I think I'm better at falling than him.
RockCoach Posted April 23, 2012 Posted April 23, 2012 (edited) how do you know if your stems too long? I get the feeling my front wheels under me when I ride. How long is a piece of string? Sounds like to you may be on a frame that it too small (that goes for the OP too). Also, how steep is the head angle compared to your last bike? To tell if your saddle is correct fore/aft... drop a plumb line from just behind your patella (boney ridge on the side of your kneecap). To be completely neutral, that should go through your pedal axle. Some riders go a little ahead or behind depending how old their knees are or what type of riding they are doing. You will use more quads if you are forward or hamstring if you are back. Stem length (on a mtb) and bar width ends up being a personal preference based on comfort and the type of riding. Generally, race position has longer stem with narrower bars. Trail/AM/gravity has shorter stem (also helps get your weight back quickly) with wider bars for more control. If you sit too upright on the bike your stem may be too short and high. If you feel too stretched out forwards it may be too long. Edited April 23, 2012 by slick
BLACKvoodoo Posted April 23, 2012 Posted April 23, 2012 Both my wheels are under me when I ride. Mostly.
Hairy Posted April 23, 2012 Posted April 23, 2012 1.83m and you are riding a medium .... Sounds more to me like you are a Large rider
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