New tyres tragedy

Tell 'Em chunks!:smiley:

Makes you shiver. :frowning:

Hi peeps,

As a newbie, can someone give me a quick explanation of ‘scrubbing in’ new tyres?



When a new tyre is fitted to your bike it has a very smooth, slippery surface and has the mould release chemicals still on the surface. Scrubbing in is a process where you just ride a bit carefully for a few miles to break the surface of the tyres.Its like when you buy a new pair of shoes, they are a bit slippery for a while until the sole is roughened up a bit.Hope this helps Steve:)

Cheers Chunky - was wondering if there was something I actively needed to do!



(Happy to admit I’m asking this from a position of ingorance, but) why on this thread do people say “Take it easy for 100 miles”, but on another thread re race tyres they’re saying “a couple of laps will scrub your new tyres in nicely”?

I understand that they may be talking about softer compound tyres (but if the issue is needing to give time to release chemicals from the mftr process, more than just getting the tyres roughed up a bit, then will the softer compound really release the chemicals SO much quicker?).

Also understand that you’re going to be putting the bike under a fair bit more braking/cornering force on a track, but we’ve still got two really different lines of opinion about (what, to me seems to be) the same question, on two simultaneous threads.

The mould release agents are only on the surface of the tyre as a rule but I guess there may be a tiny amount soaked up by the compound.The surface of a race track is way more abrasive than on your average highway and also the lean angles obtained mean that the whole of the tyre surface has been roughed up by the end of the first lap. As race tyres are pre-heated with warmers, they reach optimum temperature a lot faster than on the road too.In the road, lean angles tend to be more gradual and its a bit like running a bike in, you gradually get it closer and closer to the limit.

Thanks. I get what you’re saying, but would all the factors you mention really make the difference between 100 miles on the road and a couple of laps on a track? Or is it more a case of two urban myths colliding (obviously that’s not a perfect analogy, since I’ve gotta assume that guys on the track will have tested their theory to destruction, so I’d have more confidence in what they’re saying, albeit that it’s likely to be irrelevant to me as I may never have the experience of warming my tyres up for a track day).

well my local shop has a sign in it and they stamp your recieipt advising you to take it easy on new tyres for first 100 miles or so, and as they race the TT its good enough for me :smiley:

dont you notice when you get new tyres how odd they feel initially due to new profile, more tread etc and is it so hard to take it easy for a while for your own safety ? :slight_smile:

i just got a new bike (2 weeks ago). add the weather to that and 190bhp its been a little sketchy to say the least.

i did a burnout outside the shop i bought it from. :smiley:

much easier to scrub the tires in, in the summer though. here’s my other bike :cool:

new tyres or not. you should be able to react accordingly when your bike loses traction either way

See what you’re saying, but that’s also likely to be down to product liability issues. For instance, my topbox (manufacturer’s topbox, model specific to my scoot, which comes with engine sizes up to 500cc) came with a warning that it shouldn’t be used at speeds over 50mph or carry a load of over 10kg (rendering it effectively useless if you follow the instructions, but also immunising Piaggio against any claims).

yep thats exactly why they say 100miles.

I’ve only ever given it half a lap then full gas and not crashed doing this yet. Rolling out to the grid on new rubber you only get half a lap anyway before the race starts and I don’t bother with the brake fluid trick either. And if anyone thinks the warm up lap is anything other than flat out they are mistaken :wink:

On the road it’s surely just common sense. If you haven’t hit full lean give it a couple of goes before you go banzai.

Not just weird it is actually a disgrace to sell something so dangerous - time we complained to the manufacturers. I am sure if they sold tyres for cars that were that slippery there would be an outcry.

I actually managed to come off on my own driveway!! because of so called “release agent”. Can it really be that hard to remove the gunk after production?

I hope you never end up regretting that statement.

Recently fitted new tyres and went over em with a 'bastard ’ file first, even if you take it easy at first you are still going to contact the virgin rubber on the sides at some stage .

hmm, I have never taken any notice of this at all, i ride it hard from the moment I get them fitted, get them warm and keep them warm for 20 miles and I have no problems at all…never done it in the wet thought…that would be bad.

would never scrub my road tyres with any solvents, no matter how supposedly safe…residues from the solvent on a track bike have no time to do any damage, ie the tyres are only used the once mostly, on a road bike where the tyres are kept for months maybe years the solvent residue could do long term damage…not worth the risk in my eyes, no matter how safe it appears to be…

By the way chunks, not all rubber is the same, petrol resistant rubber, is not the same as brake fluid resistant rubber, as is diesel resistant rubber etc etc etc…you know that I am sure…

Best to stay with the ‘100miles taking it steady’ in my eyes…thats what they advise and thats what will keep them safe from the compensation claims so stick with it I guess, so dont do what I do. do what they say…

and if i do i’ll blame myself not the bike or tires :wink:

gotta say ‘so what’…if you make a mistake you make a mistake, you learn and move on…if your skills are improved by it great…dont matter whether it is the bike, the weather, the tyres or you…still hurts if you come off…mentally as well as physically…

Surely the solution is to scrub some in in the summer, and store them, should you need to change in winter?

The rubber parts in brakes are totally different to those used for tyres. They are far more resilient to solvents and oils. We could reverse your theory by scubbing your tyres with DOT brake fluid? :pinch:

I think the issue regarding road tyres being kept for far longer than track tyres being critical.

It might be paranoia but a few careful miles is not really a hardship.