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Road vibration help(9 posts)

Road vibration helpredsoxnut
Nov 17, 2002 2:47 PM
Looking for stem/handlebar/seatpost upgrades to reduce road vibration. Currently have 3T components. Any ideas?

Bike: Specialized E5 S-Works...yeah...aluminum and stiff. Great for climbing but a rough ride.
It's not about the bars/stem/seatpostKerry
Nov 17, 2002 4:02 PM
The amount of compliance you'll get from these is minimal compared to changing tires/tire pressure. Go wider on the tires and/or drop the pressure a bit. It won't affect your rolling resistance noticeably except in record pace time trials, and it will have a significant salutory effect on your comfort. Extra bar tape might help a little, but bars/stems won't change what you feel through your hands. And unless you have one of those mega-long posts in a compact frame, no change in the post (short of a shock post) will give you relief. It's all about the tires.
2nd the motion about tirescory
Nov 17, 2002 9:17 PM
That's the key, I think--if you're running something like 20s or 23s at 120 psi, try 25s or (shudder) 28mm tires at 95-105. I liked it so much I use 32s and 35s for most of my riding now, but I weigh 225.
same tire size, different brand, different confort?....Bruno S
Nov 18, 2002 12:10 PM
a friend of mine said that michelins are more confortable than continental. (at the same size and pressure) My first reaction was that it didn't made sense but then I thought about the following analogy: a soccer ball and a balloon can have the same volume but different "hardness" because one can expand. If brand A tire has a very strong casing it will expand less and transmit more vibration to the rider. If brand B has a casing that "gives" and its volume increases it will soak vibrations.

I don't know if this actually happens but it sounds possible.
Of courseKerry
Nov 19, 2002 4:43 PM
Yes, different brands, or even different models within a brand line, can have different compliance in their casing and therefore offer different ride. You may not find consensus that Michelins are more comfortable than Conti, especially without saying which model of tire. The often repeated "thread wars" where tire makers tout the number of threads per inch (TPI) of their casings is really about compliance - the implication is that more TPI = more compliant casing. More compliant casing is supposed to give better traction as the tire conforms to surface irregularities in the road. Improved comfort seems not far away. In reality, there's much more to it that just TPI.
What type of fork are you using?DINOSAUR
Nov 17, 2002 11:39 PM
I agree on the tires. I was running 130 PSI on a Klein and slowly over a period of time lowered it to 115 and it does a lot to make the ride less harsh, or rigid, or whatever you want to refer to the ride of aluminum.

I'm not familiar with this bike, but what is the stock fork? That would be the first thing I would replace to improve the ride.

As much as I love my Klein, I can't use it as a day-in day-out-ride. My 60 year old body takes too much of a pounding. But that's just me.

I'd look at wheelset/tires, fork, then worry about the stem and bar combo. You'd might be better off just packing it in and going with a new bike....

Are you talking about vibration or road shock? If it's vibration a new headset might be in order, or just change the bearings (or cassette), they don't last forever. I just went through this. Swapping out sealed bearings is about a 1/2 hour job, I'd try this before anything.

Dino
bike fit, tire pressure, saddle tilt, are all important,....eyebob
Nov 18, 2002 11:38 AM
but if you can't stand it, you're looking at a new frame to dampen everything.

BT
bike fit, tire pressure, saddle tilt, are all important,....redsoxnut
Nov 18, 2002 5:05 PM
Thanks for the replies...

My fork is the stock carbon Time Millenium. My tires are Vredestein 23 roads. Maybe I will try 25's now that winter is here. I can subjectively tell a difference with rolling resistance if I lower tire pressure below 110 psi but not a lot of change in vibration dampening.
bike fit, tire pressure, saddle tilt, are all important,....DINOSAUR
Nov 18, 2002 7:55 PM
You have a nice fork, so that eliminates that. What problems are you having exactly? My Klein is rigid, but the ride is smooth. Maybe aluminum is not the material for you.....