Make sure you have a good grip on the bars, in that case.
On 9/27/19 11:38 AM, Leah Peterson wrote:
I both laughed and shuddered over the football player’s bone-shaking.
Yes, that’s what I like - the basketball bounce you get on full tires
- I’ve just never thought of it that way! Don’t take this from me!
Because now I’m a little concerned. But maybe not concerned enough to
ride around on sloppy tires. We’ll see.
Sent from my iPad
On Sep 27, 2019, at 7:28 AM, Steve Palincsar <palin...@his.com> wrote:
On Thursday, September 26, 2019 at 4:59:25 PM UTC-4, Bicycle Belle
Ding Ding! wrote:
Why does everyone love barely inflated tires? I put the max air
in mine and ride them rock hard! Otherwise they feel flat to me.
I fly over bumps and stay in the saddle and let my bones rattle!
I’m doing it wrong, I know...
I can give you one good reason (besides comfort) why you might not
want to inflate wide tires to max pressure unless you've very heavy.
When you pump a wide tire up to high pressure it can become very
bouncy with a considerable rebound on hard impacts, a bit like a
basketball. That can, in some circumstances, snatch the handlebars
right out of your hands. It happened to me, and I crashed as a
result, breaking my collar bone. I'm not talking here about the
biopace-like surging you might get at very low pressure, where you
can feel the bike squishing the tires down on each pedal downstroke,
but rather the SPROING bounce you get when you throw a basketball
down onto the pavement.
Your "bones rattling" comment reminds me of a time at Bike Virginia,
back when they still had dinner put on by a community organization.
I was standing in line waiting for them to open, and couldn't help
overhearing the guy in front of me discussing tire pressure with his
friends. He looked a bit like a football player - large, obviously
over 250 lb. He was from Virginia Beach, and was talking about how
much he enjoyed going downhill on "the bridge" -- evidently, the only
hill in town -- on his 19mm tires inflated to 150 psi. "Rock hard,"
he said, and at 30 mph the bike vibrated so much he said "it /really/
felt fast!"
It is true you don't get the same super cushy ride benefit from lower
tire pressure with chunky, rigid-sidewall tires as you do with supple
tires with flexible sidewalls, but there's still a benefit to having
your tires as the proper pressure for your weight. At just under
100kg I'm well over the Clydesdale line and there are very few tires
that I need to inflate to the "max pressure". And I'll bet you a
chocolate milkshake I weigh a lot more than you do.
--
Steve Palincsar
Alexandria, Virginia
USA
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