It turns out the noise I am hearing is coming from a bad wheel bearing not
the tire. Sorry for the confusion! Good news is that I already needed a
brake job so it all has to be pulled apart anyway. Bad news is it has to
get done before next weekends Canadian Tandem Rally in Kingston.
I'm interested to know if there's an accurate way to quantify rolling
resistance as it relates to tread directionality. It's always been my
perception that horizontal ribs offer more traction but also create more
drag vs. lateral ribs. My assumption is that on most Japanese tires at
least the
My Challenge Eroica tires are SPOOKY quiet on the road. I didn't notice
tire noise until after I rode silent tires. I didn't necessarily think
that made them faster (but they sure seem fast).
My guess was that these Challenge tires are absolutely flat when you buy
them. Particularly the
My Grand Bois Lierre 650x38b tires are also very quiet on the road; with
just a faint rubber squishing noise. They also were flat in the package,
but I don't know if that corroborates their quietness. In both cases, it's
probably a matter of supple rubber and a low-profile tread.
Lately I've
Per your results, a Nifty Swifty is ~3% slower than a Maxy Fasty, and
wearing 1.3 mm of tread off a Rolly-Poly makes it ~2% faster. RBW describes
the difference between their stronger and lighter tire variants (i.e.
Nifty-Swify/Maxy-Fasty, Ruffy-Tuffy/Rolly-Poly, JB Blue/Green) as stronger
You are right, of course. Tread patterns and construction do affect rolling
resistance - just look at the Col de la Vie tires which use the same casing
as the Pasela, but the micro-knob pattern makes them significantly
slower... It's just that unless you go to knobbies, the tread pattern isn't
On Friday, May 9, 2014 3:02:01 PM UTC-7, ted wrote:
without measuring the speed of tires with the same casing and varying
treads I think declaring tread less significant than casing from a design
standpoint is premature.
You make a good point - you need good measurements before you make
True dat. My Compass 26 tires are noisy (they hum at speed) but they roll
quite nicely.
On Friday, May 9, 2014 11:41:30 AM UTC-7, Cyclofiend Jim wrote:
Most of the analysis of rolling resistance for bicycle tires points at
casing construction as a much more significant factor WRT rolling
Most of the analysis of rolling resistance for bicycle tires points at
casing construction as a much more significant factor WRT rolling
resistance. You can create sound without all that much energy loss, and
part of it may be related to the audiological perception of the difference
-
I would expect your Prius tires to be lower rolling resistance, oriented
toward fuel economy.
On my Atlantis, I've run Schwalbe Marathon Supremes for years. The tread
looks like Nike's swoosh and they are fairly noisy as slick-ish road
tires go. A while back, I installed a pair of Soma
If you include the rubber in your definition of casing. I am fairly sure
research has shown that slick tires have less rolling resistance than tires
with a modest tread (I can't speak to the size of the difference though).
Similarly tread compound has been shown to have an impact.
Tires with
Noisy car tires can mean a front end out of alignment or wheel balancing
issues. if its a new car under warranty have the dealer take a look at it.
On Fri, May 9, 2014 at 3:49 PM, ted ted.ke...@comcast.net wrote:
If you include the rubber in your definition of casing. I am fairly sure
We didn't test the Jack Browns, but we did test the Nifty-Swifty and
Maxy-Fasty, which are the same tires, only in 650B. The Nifty-Swifty was
about 3% slower. However, compared to other tires, both were among the
slower tires we tested, indicating that the casing has a much greater
influence
This is interesting and jibes (not jives) with my own admittedly limited
experience, particularly with Schwalbe Kojaks and Big Apples. Both of these
roll very surprisingly well given their puncture resistance and their
puncture belts, but not quite as well as the unprotected Parigi Roubaix or
Jan,
Most things are relative, and the law of diminishing returns tends to
apply. Surely there are hysteresis losses in the flexing of tread material
as it moves into and out of the contact patch, and also losses due to the
casing. Their relative significance for a specific tire may be
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