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Primoz Liked a reply to forum topic Tire chat (nerds only)
11/29/2023 3:05pm
What you measure is the relative pressure, i.e. the pressure that is above the atmospheric pressure. The absolute pressure is the relative value + atmospheric pressure. I'm more of a metric kinda guy, but if you set your tyres to 1,5 bar, the absolute pressure will be ~2,5 bar. The normal atmospheric pressure is 1013 mbar at sea level. At 2000 meters altitude it's ~0,8 bar. Thus going from sea level to 2000 m high will give you a change of 0,2 bar. This is easily 10 % more. All of this is at a set temperature, raising the temperature...
This forum topic has 1696 replies.
ChunderDownUnder Added a reply to Tire chat (nerds only)
11/29/2023 3:05pm So, I believe the tire in question, which has a tread compound that never recovers from freezing temperature, is either the ADVAN A048 or ADVAN A055. These are both Yokohama tires, and nothing in the marketing blurb mentions this, probably because it's a clear product detriment, and marketers try to stick to benefits. Yokohama does not make mountain bike tires...
carlinojoevideo Liked a reply to forum topic Tire chat (nerds only)
11/29/2023 2:53pm
Here are my non-scientific results! Frozen Tire Durometer Test Details: Used IRC Tanken treated with hot laps tire treatment(Applied months ago) Used durometer hardness tester Type “A” Temperatures taken with infrared digital thermometer Tire Temp: 58f in garage Durometer rating: 56-61 Put tire in sun for 1 hour; Tire Temp: 110f in sun Durometer rating: 55-58 Put tire in freezer for 5hours; Tire Temp: 13f Durometer rating: 65 Tire after frozen but at room temp; Tire Temp: 68f (room temp indoors) Durometer rating: 58-60 In Garage after frozen Tire Temp: 59f Durometer rating: 58-60 Other ratings for comparison (Temp 58f-60f)...
This forum topic has 1696 replies.
carlinojoevideo Liked a reply to forum topic Tire chat (nerds only)
11/29/2023 2:53pm
Freeze testing started! (I didn't freeze a new Conti, just getting other numbers for comparisons.
This forum topic has 1696 replies.
ChunderDownUnder Added a reply to Tire chat (nerds only)
11/28/2023 2:15pm Yeah, I think the components you listed are noticeable, but things like crank stiffness, wheel stiffness, handlebar compliance, and possibly even telling the difference between a carbon or aluminum frame just don't provide enough feedback for riders to reliably tell the difference. But, I like this thread because tires are a very noticeable bike component. I definitely feel like I...
ChunderDownUnder Added a reply to Tire chat (nerds only)
11/27/2023 10:27pm I agree with the broscience that easily can infiltrate these discussions. It is kind of a catch-22, though, because anything in a controlled lab isn't real-world conditions and findings can fall flat on the trails, and anything on the trails has to introduce a million variables because of the human element, variable conditions, etc. It's almost like you have to...
ChunderDownUnder Added a reply to Tire chat (nerds only)
11/26/2023 5:23pm It'd probably be best to document temperature whenever you test hardness that way conditions can be replicated for the after-the-freezer durometer testing.
ChunderDownUnder Added a reply to Tire chat (nerds only)
11/26/2023 10:48am Someone with a durometer should: 1) buy some MaxxGrips 2) test hardness 3) throw in freezer/fridge 4) remove/bring to room temperature 5) test hardness The only thing my wife would love more than storing tires in the freezer would be keeping my bike in the living room.
ChunderDownUnder Added a reply to Tire chat (nerds only)
11/25/2023 1:28pm I used to do advertising for one of the major automobile tire companies. Our most aggressive (softest) racing tread compound not only didn't work well when cold but we were told by the engineers that the tires had to be kept above a certain temperature when in storage because if they got too cold they would forever be altered and...
