681 reputation
1415
bio website xpda.com
location Pryor, OK
age
visits member for 2 years, 11 months
seen Jul 14 at 18:33

Bob Webster from Pryor, OK


Jul
14
comment How much does rider weight increase tire pressure?
This matches my June 5 comment above.
Jun
5
comment How much does rider weight increase tire pressure?
Maybe it is a simple formula. Take the interior area of the tube, maybe 78 sq inches. Fill the tire to 100 psi. Add a 150 lb rider. Is the 150 lbs distributed evenly among the 78 sq inches (assuming no tire stiffness)? If so, this would add about a little less than 2 psi. The increase in contact area would be proportional. I'm not sure about this, but it seems reasonable.
Apr
19
comment How much does rider weight increase tire pressure?
I think it has to be accurate. I checked it myself (on a tire with a shrader valve) and got the same result -- about 1 psi increase from 45.
Mar
13
comment How to mount Galaxy S3 on a mountain bike
Good question. I'm looking for an s3 mount for a road bike.
Oct
26
comment What road bike tire pressure is best for speed?
On a smooth track, rolling resistance is least with maximum pressure. That's why trains use steel wheels. A track is smooth, but roads have regular bumps half the diameter of the tire. If a tire has no "give", then the bike bounces instead of the tire deforming, which costs energy. So there is a tradeoff.
Apr
4
comment What pressure should I run my Road Bike tyres at?
Michelin says this is for comfort and handling as well as speed. If I am only concerned about speed, is higher pressure always better?
Mar
4
comment Taking a bike on a sailing boat
Most, but there can be a few (like the ones that hold the reflectors on) that may not be. It's probably not enough to carry a collection of stainless nuts and bolts, but there is probably already a collection of stainless nuts and bolts on the boat.
Dec
18
comment Safest way to slow down a bike quickly if both sets of brakes fail
Actually, a chain link fence can cause problems if it catches your handle bar just right, but not as bad as barbed wire.
Dec
13
comment Safest way to slow down a bike quickly if both sets of brakes fail
Good idea......
Dec
13
comment Safest way to slow down a bike quickly if both sets of brakes fail
Good point! :-)
Oct
6
comment How can I stop my mudguards from rattling?
I guess those cobblestones can be a bit rough, eh?
Oct
6
comment How can I stop my mudguards from rattling?
It's easy. Go around the bumps.
Oct
6
comment How do I determine the correct position for my bicycle seat?
Make sure your knees don't go in or out -- toward or away from the center of the bike -- when they are on top part of the stroke, and make sure they don't wiggle around sideways on the power part of the stroke.
Sep
21
comment Are runners or pedestrians allowed to use the bike lane?
Share the road. This is a little like someone driving a car asking if bicycles are allowed to use the auto lane.
Sep
9
comment What items should be in a bare-minimum first-aid / emergency kit?
Cell phone. All else is optional. :)
Sep
9
comment Is it considered rude to draft other random cyclists?
If you draft behind me, you should do it carefully because I wiggle around a lot.
Sep
2
comment Bailing out with SPD pedals on a mountain bike
Thanks -- I've got the SH-56.
Sep
2
comment Bailing out with SPD pedals on a mountain bike
@Angelo, it's only 1/2 second or so, but that makes the difference between crashing or jumping off.
Sep
1
comment Bailing out with SPD pedals on a mountain bike
"When you say that you're able to bail when you know you're going to crash... You would have time to unclip too." No, that's not correct. That's the problem -- sometimes when I would normally bail, I can't because there's no time to unclip.
Sep
1
comment How can you speed a road-bike up?
Pedal faster. :)