Dual compound tyre wear

**Hiflyer** · 22nd October 2009, 08:38

Hey Guys,

I have a set of Battlax BT 45's on my hyosung, (Dual compound, hard middle softer outside) and I noticed this morning that the outside edges of the tyres seem to be wearing faster than the middle, so theres a slight edge between the two compunds, should I be worried about this?

I thought I should get a dual cpmpound cos I commute but maybe I should stop leaning so much

**george formby** · 22nd October 2009, 08:41

Originally Posted by Hiflyer

Hey Guys,

I have a set of Battlax BT 45's on my hyosung, (Dual compound, hard middle softer outside) and I noticed this morning that the outside edges of the tyres seem to be wearing faster than the middle, so theres a slight edge between the two compunds, should I be worried about this?

I thought I should get a dual cpmpound cos I commute but maybe I should stop leaning so much

Your bragging, don't stop leaning.

**Hiflyer** · 22nd October 2009, 08:46

Haha in all seriousness should I worry?

**vifferman** · 22nd October 2009, 09:03

I have read (but cannot verify it personally) that running them at the worngA pressure can cause what you've described. I'm not saying or implying that's what you've done, just passing on some data.

**Blackbird** · 22nd October 2009, 09:24

See the evaluation of the new Avon dual compound: http://www.kiwibiker.co.nz/forums/sh...post1129452302. Retained a perfect shape and I'd think that something is amiss if you get a discernable step. I think that Vifferman is right about tyre pressures and is an easy check to verify or eliminate.

**MSTRS:Me** · 22nd October 2009, 09:45

Yea, quite possibly running too soft. What is the actual psi you have in there?

**CookMySock** · 22nd October 2009, 09:47

I'm getting the same thing. The rear is scalloping out like a front usually does. Edges are fine, middle is mint, in-between is getting a hiding. Running Michelin PR2.

Should I do more touring and less cornering?

Less booting it out of corners?

More fatting it hard in a straight line?

Yeah any tyre pressure specifics would be good.

Steve

**MSTRS:Me** · 22nd October 2009, 09:54

180kg of bike + rider...I'd think you'd be needing 38-40psi in the rear
(DB - stay off the catseyes...that'd help the transition parts of your tyres)

**Hiflyer** · 22nd October 2009, 09:59

Yea I'm running 38 in the rear, front is fine though. maybe put it up to 39 or 40?

**meowmix** · 22nd October 2009, 10:39

Thats interesting. My BT45 doesn't have a step, but I can see the the compound transition in the right light. My commute is about 50% 25-45kph corners (schweet). And I am known to do the occasional burnout..
My guess is that our lightweight bikes aren't wearing the centre section sufficiently, as these tyres were made for big fat tourers riding on big fat straights. Solution? Burnout!

**scumdog** · 22nd October 2009, 10:42

Since (planned) sudden stops are normally in a straight line and at that stage the harder centre section is in contact with the road is your grip compromised compared with a 'regular' tyre?

Or is the tyre not THAT hard in the centre?

**Blackbird** · 22nd October 2009, 10:47

Originally Posted by scumdog

Since (planned) sudden stops are normally in a straight line and at that stage the harder centre section is in contact with the road is your grip compromised compared with a 'regular' tyre?

Or is the tyre not THAT hard in the centre?

I think the term "harder" compound is slightly misleading Tom. The harder compound in the centre of the VP2 I tested is clearly a bit softer than the normal compound on the Storm. It just ain't as soft as the outer edges!

**scumdog** · 22nd October 2009, 10:52

Originally Posted by Blackbird

I think the term "harder" compound is slightly misleading Tom. The harder compound in the centre of the VP2 I tested is clearly a bit softer than the normal compound on the Storm. It just ain't as soft as the outer edges!

Understood.

Anybody else got any experiences re this?