Tyre problems. HELP please - SV650.org

09-09-06, 07:37 PM

Stock tyres Dunlop Sportmax D220F ST.
3600 miles, Front 3.2mm avg tread, rear 4.5mm avg tread
pressures 33(f) and 36(r)
Out today with pillion and back felt very squirmy when cornering, so much so i cut short ride and came home. Had a look at rear tyre and apx inch from each side looks strange as if rubber perishing. Is this normal, is this a problem, are the tyres done, or have i had a bad day and this is all in my head. I've only been riding 3 months all on the sv, all on these tyres, so I have zero experience. Any help appreciated.

I know you have to run in new tyres for 150miles, only thought was that as i was leaning over further onto strips of tyre i'd not used before and that these strips still had the original coating and hence were slippy, but this is probably rubbish.

front, all looks ok.

You need to open the photos to see the texture, best pic is last one.

09-09-06, 07:52 PM

I can't see any problem with them - they look OK to me, nothing untoward in the pics. I'd put a few more psi in if I was carrying a passenger.

09-09-06, 07:52 PM

Just looks like normal wear to me fella. You want to see the edges of tyres after a track day! They look wrecked! Maybe check the pressures especially when opting to take a passenger and maybe consider adjusting rear shocker for the extra load.

Red ones · 09-09-06, 07:58 PM

I'd agree with PH (for once)

Whack the rear suspension up a notch and put about another 3 psi in front and back. It makes a HUGE difference - but they look OK

Stu · 09-09-06, 08:01 PM

I prefer "That standard is 36psi at the front and 42psi at the rear." from "What are the correct tyre pressures for Avon tyres (av35/36) " Faqs on the main site

fizzwheel · 09-09-06, 08:29 PM

That rear looks a bit squared off to me. It might just be the camera angle though. Do you do a lot of motorway / dual carriageway riding ? If so a squared off rear tyre might be giving you the squirmy characteristics.

Also it might be a bit flat have you checked your tyre pressures ?

09-09-06, 10:04 PM

my rear looks like that (square)

mattSV · 10-09-06, 01:21 AM

They look fine to me.

This what a ****ed tyre looks like:-

On my SV1000, settting the tyre pressures to 36/42 with a pillion makes a big difference.

10-09-06, 06:26 AM

theres plenty left on that! (on the sides

)

10-09-06, 09:42 AM

Quote:

Originally Posted by Kilted Ginger

Out today with pillion and back felt very squirmy when cornering, so much so i cut short ride and came home.

Could be the effects of the harvest - stoor everywhere on the roads.

09-09-06, 07:37 PM	#1
Kilted Ginger Guest Posts: n/a	Tyre problems. HELP please Stock tyres Dunlop Sportmax D220F ST. 3600 miles, Front 3.2mm avg tread, rear 4.5mm avg tread pressures 33(f) and 36(r) Out today with pillion and back felt very squirmy when cornering, so much so i cut short ride and came home. Had a look at rear tyre and apx inch from each side looks strange as if rubber perishing. Is this normal, is this a problem, are the tyres done, or have i had a bad day and this is all in my head. I've only been riding 3 months all on the sv, all on these tyres, so I have zero experience. Any help appreciated. I know you have to run in new tyres for 150miles, only thought was that as i was leaning over further onto strips of tyre i'd not used before and that these strips still had the original coating and hence were slippy, but this is probably rubbish. front, all looks ok. You need to open the photos to see the texture, best pic is last one.

09-09-06, 08:29 PM	#6
fizzwheel Super Moderator Mega Poster Join Date: Dec 2003 Location: Somerset Posts: 3,614	That rear looks a bit squared off to me. It might just be the camera angle though. Do you do a lot of motorway / dual carriageway riding ? If so a squared off rear tyre might be giving you the squirmy characteristics. Also it might be a bit flat have you checked your tyre pressures ? __________________ Look Dave, I can see you're really upset about this. I honestly think you ought to sit down calmly, take a stress pill, and think things over. K5 GSXR 750 Anniversary Edition

10-09-06, 01:21 AM	#8
mattSV Member Mega Poster Join Date: Jul 2003 Location: Darn sarf, innit Posts: 2,025	They look fine to me. This what a **ed tyre looks like:- On my SV1000, settting the tyre pressures to 36/42 with a pillion makes a big difference. __________________ 2000 - 2004 SV650S 2004 - 2009 SV1000S 2009 - 2013 Triumph Sprint ST1050 2013 - 2016 Triumph Explorer 1200 2016 - Ducati Multistrada DVT S**

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09-09-06, 07:52 PM	#2
Ed Guest Posts: n/a	I can't see any problem with them - they look OK to me, nothing untoward in the pics. I'd put a few more psi in if I was carrying a passenger.

09-09-06, 07:52 PM	#3
Peter Henry Guest Posts: n/a	Just looks like normal wear to me fella. You want to see the edges of tyres after a track day! They look wrecked! Maybe check the pressures especially when opting to take a passenger and maybe consider adjusting rear shocker for the extra load.

09-09-06, 07:58 PM	#4
Red ones Member Mega Poster Join Date: Jul 2003 Location: Hertfordshire Posts: 1,422	I'd agree with PH (for once) Whack the rear suspension up a notch and put about another 3 psi in front and back. It makes a HUGE difference - but they look OK

09-09-06, 08:01 PM	#5
Stu Trinity Mega Poster Join Date: Jun 2006 Location: Guildford Posts: 8,027	I prefer "That standard is 36psi at the front and 42psi at the rear." from "What are the correct tyre pressures for Avon tyres (av35/36) " Faqs on the main site

09-09-06, 10:04 PM	#7
kwak zzr Guest Posts: n/a	my rear looks like that (square)

10-09-06, 06:26 AM	#9
kwak zzr Guest Posts: n/a	theres plenty left on that! (on the sides )