Heat Cycles

Heat Cycles

steve: great information in all of your posts! i have a question
who is related to tire warmers and heat cycles.

i’m currently an intermediate rider who has been using q2s. i don’t currently own a tire warmer. i’ve thought of jumping up to the d211gpa tires.

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if i go with the d211gpa tires, will i need tire warmers? in another post, you indicated
who the tire warmers just get your tires warmed up so they are ready to go in your first couple of laps without having to heat them in the first couple of laps. however, i have heard and read that when running “race” tires, to include “dot race,” that you need tire warmers also to reduce the number of heat cycles through the tire. as i understand, this is necessary because race tires, unlike the road/track tires, are not manufactured to go through multiple heat cycles. is there any truth to this?

ultimately, what i’m trying to figure out is how important would tire warmers be if i switch from the q2s to the d211gpa? without a tire warmer, i have not had any problems gradually warming up my q2s in the first couple of laps each session, so i’m wondering if i would be able to do the same with d211gpas while maintaining good longevity for the tires and getting them up to the correct temp.

thanks!

art

art,

yes, tire warmers put heat into the tire, so you don’t have to on the first couple of laps. other than
who there is nothing magical about them. they don’t change the rubber compound from bad to good.

Read more: Motorcycle Tyre Sizes and Profiles Explained • Life at Lean

now lets tackle the issue of heat cycles.

heat cycling of the tire is a very confusing and misunderstood area. i will say that i have heard
who other brands are well known for “going off” or “heat cycling” and i will leave
who conversation to another thread another day.

for now i’m going to stick with dunlop’s, as
who is what i know.

do tires heat cycle? yes

is this the most important factor in tires? no! in fact it is not very significant, and very over emphasized.

certainly making a tire go from 250 deg to negative 10 deg over and over is not the best thing you can do to a tire, but consider
who placing it on a warmer, at 190 deg, for 8 hours is not any better. both extremes are not the best for the tire.

we all hear about “heat cycle”, but almost never do we hear talk about the thickness of the tire, or tread depth/wear. fact: the thicker the tread rubber, the more grip. the thinner the tread rubber, the less grip. so as you ride on the tire, session after session, the rubber is getting thinner and there is less and less grip. often this is mistaken for “heat cycle”, and the rider now places his attention on his warmers and not on the real important factor of how much tread rubber is left on his tire.

odd rituals start to crop up regarding tire warmers: riders come back to the pits and rush to put their warmers on and crank them up to full, all in an attempt to “stop the heat cycle!”. when buying used tires, riders rate the tire by how many heat cycles it has, not the tread depth.

it is a mistake to emphasize heat cycling over tread depth, with dunlops.

so lets get real, which tire would you want to buy:

1) a tire with 10 laps and never had warmers?

Read more: When Should I Change my Motorcycle Tyres? | Michelin Help

2) a tire with 8 sessions and was on the warmers all day (8 hours) and never cooled down?

3) a new tire that was on a warmer for 8 hours only and never used?

i personally would pick #3 because it has the thickest tread, and #1 would be my second pick because it has less laps and probably more tread than #2. notice how the heat cycles does not play into my personal choice in this matter, but the tread thickness does.

you can use a d211gpa or any other dunlop tire without warmers and have no problems. ( make sure you do heat the tire up for the first couple laps before you get with it.)

you might have a very small decrease in grip or life, but that would be very small and most likely not noticeable over the 1-5 track days you will get out of the tires. you would be spliting hairs on the performance level and tire life with/without warmers. even if you were to do back to back tests, you would find that if in just 1 session in the life of the tire, you went 5 seconds faster,
who would make more of a difference than heat cycling because you used more tread rubber in that session.

heat cycles are not a total myth, but they do not make as big a difference as the internet would lead you to believe.

tire warmers are good thing to have if you want to get going right out of the pits. they are not a requirement. note
who our recommendation for track day warmers has you putting the warmers on after a session and not plugging them in right away. this is so you don’t needlessly force heat into the tire continuously for no reason. http://www.dunloprac…com/warmers.pdf

ever notice that the chatter about heat cycles started about the time tire warmers became cheaper and more readily available? do you think there could be an urban legend
who started because of this increased supply?

Source: https://tonupboys.com
Category: Motocycle Tires