A puncture after 50 miles.

It's a biggy too, on brand new tyres.

Arse.

 

It's the 'brand tyre new magnetism' innit.

A combination of the heat involved in moulding the tyre and the metal
banding inside sets up a very small electrical field that magnetises
the carcass of the tyre.
Consequently, for the first 50-100 miles every new tyre will 'attract'
screws to them, causing punctures. This is why so many tyre fitters
are based in metal-working industrial estates - it's good for repeat
business!

The 'scrubbing-in' process will slowly degauss the tyre. It's earthing
through the tread and the non-conductivity of the tarmac that allows
this to happen.
Once the tyre is properly run-in/degaussed the chances of having a
puncture are significantly reduced.

HTH
<wanders off whistling to self>

 

Well put it this way, I didn't have to look for the hole...

 

That's just plain unlucky mate. Can't be fixed? Could you run a tube in it?

 

He shouldn't need to. Avon, right? The little fine groove that runs
across the centre block of tread - that's 1mm deep, see. Providing
you've not worn that out - and there's no way you'll have done that in
50 miles(1) - the dealer will replace the tyre for you for a nominal
charge. So a bloke in a pub told me once, anyway.


1. My rear still has the groove after 4,500 not very easy miles.

 

Who was it who said "Get Avons, they have a 1500 mile warranty
against punctures" ?

Tempting fate, dude. Tempting fate.

 

Now that, is fantastic science.
You explained that far better than Alf Einey did with his theory thing.

Still utter bollox though but perfect all the same )

 

Wanna borrer me trailer??

 

Whinging Courier says...

Avons?

If so then take it back from whence it came, because you have a puncture
guarantee with them if it happens in the first 1mm of tread wear.

 

Sounds good.

My next set of tyres will be Avons. I've got a rear to finish off and
another part worn one in the shed, then the front will need replacing too.

 

Muck says...

My next pair of tyres will be whatever is sticky for the right money.
Whatever they are, they won't be another pair of normal Dunlop D207s,
it's like going back 25 years to when all tyres were made of bakelite.
In all seriousness, I think BT020s have a far higher level of grip.

 

I tried Michelin Macadam 100x on the Bandit once, never again. Those
were so shite in the wet, but ok(ish) in the dry.

Some sticky tyres would be good for the FZR, but it's got odd sizes, as
in small. So.... tyre choice will be limited. BT45s it is then.

 

Muck says...

What sizes does it take?

 

100/80 - 17 front
130/70 - 17 rear

 

Didn't I put BT39s on it, with an SS on the front? Don't know if you can
still get them but they are/were used for production 125 racing and, given
the FZRs speed limiter and so isn't much faster than a tuned 125, were a
very nice choice of tyre, IMHO and much better than BT45s....

Dave

 

Maybe. If I can't get something sorted out quickly tomorrow, then yes.

Cheers.

 

I knew they had a puncture guarantee but wasn't sure how they could tell
the mileage. Now I do.

Ta.

 

Bad form etc etc etc.

Bridgstone still list the BT39SS in a 100/80-17F and the BT39 in a
130/70-17R.... So I'd definitely recommend you get them over the 45s which
even Bridgstone market as a "touring type tyre" these days....

Dave

 

Muck says...

Go for 110/70-17 front and a 140/70-17 and then choose tyres suitable
for the current crop of race rep 400s, something like these perhaps?

http://www.dunloptyres.co.uk/bike/radial/gpr70/index.html

http://www.dunloptyres.co.uk/bike/radial/gpr80/index.html

http://www.bridgestone-eu.com/bfe/v/index.jsp?vgnextoid=
00000000000000000000001_2_299articleRCRD&vgnextchannel=
000000000000000000000000000000000396RCRD

http://www.bridgestone-eu.com/bfe/v/index.jsp?vgnextoid=
00000000000000000000001_2_260articleRCRD&vgnextchannel=
000000000000000000000000000000000396RCRD

HTH

 

I had a word with the local bike shop, and they said those tyres weren't
made any more. Dunno how factual that is though. I do like the BT39s, if
I could get something equivalent I'd be happy.

Do you know where the limiter is, and if I put a kmh to mph converter
gearbox on the cable, is it going to limit it to some low speed?