MTB (mountain bike riders) anyone?

[Verbl Kint]

Actually, riders look at Reach these days as opposed to seat post height, which is an outdated way of measuring bike sizes. Reach (closely related to top tube length) typically is now part of a bike's geometry measurements.

Revisionist Theory of Bicycle Sizing

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[Vodka]

Actually, riders look at Reach these days as opposed to seat post height, which is an outdated way of measuring bike sizes. Reach (closely related to top tube length) typically is now part of a bike's geometry measurements.

Revisionist Theory of Bicycle Sizing

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seat tube length, not seat post height was the old way of categorizing s m L XL etc

actually you have to look at the whole package, not just horizontal top tube length. doesn't matter what your effective TT length is if e.g. standover is too high etc

but i agree that long effective TT is great coupled with short stem

[ozcity]

standover height is not applicable on dually..

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[Vodka]

standover height is not applicable on dually..

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LOL what did you say? of course not

although i have to say the top tube slopes down pretty low on most frames nowadays, except for some XC oriented ones

[safeorigin]

frame sizing is weird for mountain bikes.

in road bikes, it's a HUGE deal, yet pretty straightforward across manufacturers.

for a serious mountain bike, you really want to delve into the details of the geometry because it affects the way the bike handles and how it affects the rider(you're either in or on the bike)

you might want to use this: geometryCalc

or if you're really serious, probably even try linkage.

it might surprise people how much 0.5 degrees using offset bushing can radically change a bike's behavior

heck, some proponents of nicolai geometrons think that frame sizing is a thing of the past

[safeorigin]

just got my citius today. initial inflation, she measures 62.5mm in width with a 29mm ID rim.

x knobs measured 4.5mm in height. \ / knobs measured 5. side knobs are 6mm.

very much like a minion. only suppler and probably slightly less rolling resistance. but still grippy to the touch. maybe 85-95% of a minion. but that's compared to a friend's trek session setup.

looks HUMONGOUS. easily around the diameter of a 29 x 1.9 wheel.

[Vodka]

i generally like shimano stuff but this Icetech rotor is just a scam

i know aluminum is a better conductor than steel but it's just sandwiched between 2 layers of steel braking surfaces so it ends up not being of any benefit

then it uses an aluminum spider, but it's just riveted to the braking surfaces i.e. has a poor thermal interface to the hot braking surfaces so heat gets barely transferred to the spider

and since very little heat gets to the spider then almost no heat gets to the hub. so i'm just joking w/ this pic of thermal grease


but as for Icetech BRAKE PADS they work great. so just skip the rotors and just get the finned icetech pads

[ozcity]

tried motorcycle fork oil on my RS..naging sticky yung movement..so i just ordered standec fork oil from crc for $15 and it works well..

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[safeorigin]

as for finned rotors, I just went ahead with uberbike radiator rotors 180 and 160 months ago. Costs a fraction of freeza and looks even better

if they're good enough for steve peat, then a guy as small as I do won't have problems when we do 1200-1800 meter descents.

as for fork oils. We service our forks in the shop using Maxima 20wt. It has similar viscosity and rheological characteristics of fox gold 20wt but without the absurd price tag.

[Verbl Kint]

I am saying this from experience. You can actually feel the difference after repeated multiple runs. I do ride DH and Enduro, so if you're an XC/DJ rider ymmv.

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[safeorigin]

well it would work in that it would transfer heat from the primary braking surface to the aluminum core through conduction though heat retention would be the problem.

but then dh runs tend to last less than 6 or so minutes, I guess it wouldn't matter if it's finned or not.

if it's an extended ride then it would matter because you want to flush the accumulated heat.

[Vodka]

"feel" daw nya yung difference. but he said it himself that it's less than 5%

the force is strong w/ this one (see thresholds of human perception)

to be fair, aluminum does have higher heat capacity than steel, meaning it takes more calories to "fill" it up w/ heat. but it's such a thin layer as you said heat has nowhere to go but to be dissipated through the steel surfaces again

shimano missed the opportunity to conduct the heat to the aluminum spider. they should've made the interface wide enough, and with the appropriate thermal interface material. not silicone-based coz that would migrate to the braking surfaces. there are plenty of phase-change TIMs that are suitable, but that would make production costs higher

[safeorigin]

well, they did a pretty good job designing dura ace 9200 rotors though...



very ***y and aero

though I wouldn't be sure if I want the aluminum spider to absorb heat as well since this can happen



but then this is already the realm of carbon ceramic rotors...

[Vodka]

yeah those dura ace rotors look really cool (cool in the non thermal way )

here's another delaminated icetech

[ozcity]

riding manly dam tomorrow..wohooo

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[ozcity]

dont worry hes ok...


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[ozcity]

boys where i can buy 510 shoes around makati/mandaluyong area?

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[safeorigin]

boys where i can buy 510 shoes around makati/mandaluyong area?

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I bought mine on Ebay...

[safeorigin]

turns out, Aaron Gwin had been using Onza tires all along. The unbranded tires were prototypes of "highrollers" with different siping and squaring...

[MR_BIG18]

miss riding, this was taken years back, im the one holding the camera