18psi in the rear this morning.....
18psi in the rear this morning.....
Author
Discussion

chilli

Original Poster:

17,320 posts

257 months

Thursday 15th February 2007
quotequote all
I noticed it moving around a bit last night, so knew it was a bit soft. But 18psi this morning. Now what do we think...tyre not checked for a couple of weeks (probably more boxedin ) so is it likely to be ok, or a small puncture?

Cheers.

Rawwr

22,722 posts

255 months

Thursday 15th February 2007
quotequote all
Well, if it was a big puncture, it'd be flat

I'd seriously consider checking the sides and upper edges for anything obvious, though.

rsvmilly

11,288 posts

262 months

Thursday 15th February 2007
quotequote all
You'll probably find you've got a nail in it. I had to throw away a new tyre for that, last year.

hiccy

664 posts

233 months

Thursday 15th February 2007
quotequote all
Sounds like a puncture to me, check for nails and pray it's near the centre, not near the sidewalls.

chilli

Original Poster:

17,320 posts

257 months

Thursday 15th February 2007
quotequote all
Well, the tyre has been soooo squared off, the bike could stand up on its own! A new tyre me thinks.

Is it ok just to replace the rear?

anonymous-user

75 months

Thursday 15th February 2007
quotequote all
Yes!

chilli

Original Poster:

17,320 posts

257 months

Thursday 15th February 2007
quotequote all
gethyn said:
Yes!


I guess it has to be the same tyre though?

Cheers.

remal

25,071 posts

255 months

Thursday 15th February 2007
quotequote all
chilli said:
gethyn said:
Yes!


I guess it has to be the same tyre though?

Cheers.



I have read that some people mix a bt-014 front with bt-020 rear but I would probably use the same make and model tyre


Edited by remal on Thursday 15th February 08:59

anonymous-user

75 months

Thursday 15th February 2007
quotequote all
I'm sure someone with more knowledge than me will clarify why it's often advised not to use different tyres on front and rear (cos I can't see why there should be a problem). I always use the same type, but only because I'm such a careful and sensible chap!

ballon

1,173 posts

240 months

Thursday 15th February 2007
quotequote all
chilli said:
gethyn said:
Yes!


I guess it has to be the same tyre though?

Cheers.


Yes, not recommended to mix makes.

chilli

Original Poster:

17,320 posts

257 months

Thursday 15th February 2007
quotequote all
Cool, thanks for your help.

fergus

6,430 posts

296 months

Thursday 15th February 2007
quotequote all
it really doesn't matter about mixing tyres, you should only really be worried about the profiles front to back. Clearly, putting tyres of wildly different grip levels on each end isn't a good idea either, but you won't come to any harm at all mixing them up.

catso

15,691 posts

288 months

Thursday 15th February 2007
quotequote all
A well respected, experienced tyre supplier/fitter told me that it's to do with the structure/profile, having the same brand means the bike handles like it was designed to, he told me that certain different makes will work together OK if they have the same structure particularly because some different brands are actually produced by the same manufacturer and so are essentially (tread pattern apart) similar.

That said I don't suppose a mis-matched pair is any worse than a new front/worn rear combo of the same brand and that it would be highly unlikely to cause massive problems, however I would stick with the same brand.

The only mix I've done (recently) was using a new Pirelli Diablo rear with an existing Pirelli Dragon Evo front and I was told that this was OK, which is why the conversation arose with said tyre man, who could quite easily have sold me a new front tyre aswell if he'd told me it was not a wise mix.

beer

black-k1

12,632 posts

250 months

Thursday 15th February 2007
quotequote all
remal said:
chilli said:
gethyn said:
Yes!


I guess it has to be the same tyre though?

Cheers.


I have read that some people mix a bt-014 front with bt-020 rear but I would probably use the same make and model tyre


A couple of years ago I mixed a BT-010 front with a BT-020 rear on the Firestorm. This was, at the time, a Bridgestone recommended mix. For the first time in over 20 years of motorcycling I parted company from a bike after I spun the rear up mid 110mph left hander at Rockingham. After that event I noticed that Bridgestone no longer recommended that mix and have since then not mixed tyre variants, even within the same manufacturer even if approved by the manufacturer.

chilli

Original Poster:

17,320 posts

257 months

Thursday 15th February 2007
quotequote all
[quote=black-k1 For the first time in over 20 years of motorcycling I parted company from a bike after I spun the rear up mid 110mph left hander at Rockingham. [/quote]


yikes Jesus....what was the outcome of that?

black-k1

12,632 posts

250 months

Thursday 15th February 2007
quotequote all
chilli said:
black-k1 said:
For the first time in over 20 years of motorcycling I parted company from a bike after I spun the rear up mid 110mph left hander at Rockingham.



yikes Jesus....what was the outcome of that?


It was either the luckiest or the unluckiest day of my motorcycling life – depends how you look at it.

Spun the rear up, almost high sided but managed to just stay on the bike (That’s the lucky part!) Was then no longer pointing at the ‘black bit’ so entered Rockinghams longest gravel trap. Managed to keep the bike upright all the way along the gravel trap (and it was a long way) until I eventually ran out of room. Hit the grass verge at an angle, doing no more than 5mph and fell over. Bike sustained minor damage to right hand side fairing, minor scuff to seat surround and slightly bent foot peg. About what you would get if you dropped the bike getting it off the stand. I landed on my right shoulder and broke and dislocated it! (The unlucky part!)

Forgot to add, the nice Harris enlarged tank I have landed on my boot and sustained a nice dent! Doh!



Edited by black-k1 on Thursday 15th February 10:12



Edited by black-k1 on Thursday 15th February 10:20

sjtscott

4,215 posts

252 months

Thursday 15th February 2007
quotequote all
Worn rear tyres pick up more punctures esp riding round london with its gloriously clean and tidy roads, its a fact of life. I've lost count of the number of slow punctures I've had in rear tyres over the last 7 years. This is why its good to check pressures at least once a week (though I forget regularly too). I've also got into the habit of spending a few mins each week checking the rear over for foreign objects. Spit is a good indicator of a leak, so if you find something suspect use some to see if it bubbles up! Simple trick and have def saved me in the past! I keep a foot pump at home which has again saved me many times.. allowed me to put air into a slow puntured tyre and get to the tyre place to get it fixed.

020s are not and never have been track tyres. They are a road tyre.
My soon to be departing R6 came with 020s all round!!!!! Previous owner had done at least one or two track days on them in between commuting on it as they were used all the way to the edges (had the rough edge ripples of track use). He'd bought the R6 as he'd binned his gixxer750 at the ring!

I have mixed 010 front and 020 rears on my old falco which worked perfectly. Falco being 1000cc twin was heavy on rear tyres. But that was in the early part of this centuary.. they got replaced with Metzeler Sportec M1s which were in another league. These are one and the same tyre as Pirelli Diablos (save for the tread pattern).
Each and every bike since has had these Diablos fitted and until something new and revolutionary comes along I shall continue to use them.


Edited by sjtscott on Thursday 15th February 10:31

black-k1

12,632 posts

250 months

Thursday 15th February 2007
quotequote all
sjtscott said:
020s are not and never have been track tyres. They are a road tyre.
My soon to be departing R6 came with 020s all round!!!!! Previous owner had done at least one or two track days on them in between commuting on it as they were used all the way to the edges. He'd bought the R6 as he'd binned his gixxer750 at the ring!

I have mixed 010 front and 020 rears on my old falco which worked perfectly. Falco being 1000cc twin was heavy on rear tyres. But that was in the early part of this centuary.


It was 2001 when I had my 010/020 mix on the bike. At the time I had them fitted the Bridgestone web site recommended them for the Firestorm for a mix of riding from occasional track days to touring. That was exactly how I used my bike at that time. After I came off I went back to the Bridgestone web site and they no longer recommended the mix, they stated 010s all round.

I have not previously or subsequently suffered a ‘non-induced’ spin up of a tyre in the dry and while I was not ‘hanging around’ at Rockingham, I was not pushing too hard as it was 18 minutes into the 20 minute session on a warm, dry late May day and I only just had the peg kissing the tarmac

I think that’s my point with regard to mixing tyres. Even if a mix is ‘recommended’ by manufacturer/tyre fitter, I would still be very reluctant to fit a mix of tyres following my own experience. I have always been very careful with my choice of bike tyres and have always used the manufactures recommendations matched to my style/type of riding.

chilli

Original Poster:

17,320 posts

257 months

Thursday 15th February 2007
quotequote all
black-k1 said:
chilli said:
black-k1 said:
For the first time in over 20 years of motorcycling I parted company from a bike after I spun the rear up mid 110mph left hander at Rockingham.



yikes Jesus....what was the outcome of that?


It was either the luckiest or the unluckiest day of my motorcycling life – depends how you look at it.

Spun the rear up, almost high sided but managed to just stay on the bike (That’s the lucky part!) Was then no longer pointing at the ‘black bit’ so entered Rockinghams longest gravel trap. Managed to keep the bike upright all the way along the gravel trap (and it was a long way) until I eventually ran out of room. Hit the grass verge at an angle, doing no more than 5mph and fell over. Bike sustained minor damage to right hand side fairing, minor scuff to seat surround and slightly bent foot peg. About what you would get if you dropped the bike getting it off the stand. I landed on my right shoulder and broke and dislocated it! (The unlucky part!)

Forgot to add, the nice Harris enlarged tank I have landed on my boot and sustained a nice dent! Doh!



Edited by black-k1 on Thursday 15th February 10:12



Edited by black-k1 on Thursday 15th February 10:20


Blimey.... I guess you could call that lucky.... Having an "incident" at 110 could have been much worse.

chilli

Original Poster:

17,320 posts

257 months

Thursday 15th February 2007
quotequote all
sjtscott said:
Worn rear tyres pick up more punctures esp riding round london with its gloriously clean and tidy roads, its a fact of life. I've lost count of the number of slow punctures I've had in rear tyres over the last 7 years. This is why its good to check pressures at least once a week (though I forget regularly too). I've also got into the habit of spending a few mins each week checking the rear over for foreign objects. Spit is a good indicator of a leak, so if you find something suspect use some to see if it bubbles up! Simple trick and have def saved me in the past! I keep a foot pump at home which has again saved me many times.. allowed me to put air into a slow puntured tyre and get to the tyre place to get it fixed.

020s are not and never have been track tyres. They are a road tyre.
My soon to be departing R6 came with 020s all round!!!!! Previous owner had done at least one or two track days on them in between commuting on it as they were used all the way to the edges (had the rough edge ripples of track use). He'd bought the R6 as he'd binned his gixxer750 at the ring!

I have mixed 010 front and 020 rears on my old falco which worked perfectly. Falco being 1000cc twin was heavy on rear tyres. But that was in the early part of this centuary.. they got replaced with Metzeler Sportec M1s which were in another league. These are one and the same tyre as Pirelli Diablos (save for the tread pattern).
Each and every bike since has had these Diablos fitted and until something new and revolutionary comes along I shall continue to use them.


Edited by sjtscott on Thursday 15th February 10:31


Good stuff....cheers.