Dual compound tyre wear

[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 :banana:

[george formby]

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 :banana:

Your bragging, don't stop leaning.:2thumbsup

[Hiflyer]

Haha in all seriousness should I worry?

[vifferman]

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]

See the evaluation of the new Avon dual compound: http://www.kiwibiker.co.nz/forums/showthread.php?p=1129452302#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]

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

[CookMySock]

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? :cry:

Less booting it out of corners? :cry:

More fatting it hard in a straight line? :yawn:

Yeah any tyre pressure specifics would be good.

Steve

[MSTRS]

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]

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

[meowmix]

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]

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]

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]

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?

[Hiflyer]

Understood.

Anybody else got any experiences re this?

The BT45s "hard" compound has significantly more grip compared to the Shinkos.... then again so would an icecream container

[scumdog]

At a guess these tyres would be no good on my bike given the centre section SEEMS likely to be the same hardness as my Conti Tour, am I right?

[MSTRS]

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

Maybe. I run PR2 (duals) on my 750 at 37 in the rear, and I don't have a problem with a transition 'step". They wear remarkably even across the tread.

[vifferman]

Maybe. I run PR2 (duals) on my 750 at 37 in the rear, and I don't have a problem with a transition 'step". They wear remarkably even across the tread.
Really? That's good.
Check this (http://www.vfrdiscussion.com/forum/index.php?showtopic=54362) out.

[MSTRS]

Cupping? That's another matter. And yes, I got that both ends. Front scoured badly on the shoulders (triangulating), probably because I ran that at 33psi. Didn't affect grip or feel, but I tossed them after 18,000kms.

[discotex]

Understood.

Anybody else got any experiences re this?

Remember when upright and braking (or accelerating) you have a load of force - gravity plus the downward force due to the pivot of the bike - pushing the contact patch into the surface. This means you can get away with a harder compound than on the sides.

[boman]

I run 2CT michelins on the back of the SV. I am really happy at the way they are wearing. Half way through the life of them, and they are not showing the touring wear in the middle at all. The previous Michelins had a definate flat accross them by this stage.

[Mishy]

Remember when upright and braking (or accelerating) you have a load of force - gravity plus the downward force due to the pivot of the bike - pushing the contact patch into the surface. This means you can get away with a harder compound than on the sides.

Yes, the old "load overcomes slippage" scenario, and motorcyle tyres are in an almost constant state of slippage, so load matters a lot :)

[Kiwi Graham]

Having my PR2's replaced tomorrow. Sides have worn out before the middle but no noticable 'step' the've done 11,000k.
Well pleased with them and more than happy to have the same again on a big heavy high grunt bike like the mighty 14.

[AllanB]

PR2's here - no issues yet (5,000 kms).

I have noticed that they stick like Superglue and do not appear to actually wear much ........

This worries me as how the heck do they expect to make lots of money if my tyres don't wear out :lol::lol::lol::lol::lol::lol::lol:

[crazyhorse]

Dual Compound tyres are designed for the corners - so depends on where you live or the kind of riding you do, will depend on the wear you get.

I had battleaxes, and they wore out within 4km, but we do heaps of fast winding roads. I found that when they went off, they started to let go.

I now run Pilot road 2's. They're a good tyre.

[StoneY]

Hey Guys,

I have a set of Battlax BT 45's on my hyosung

Had these front and back on my GSX600F, at 36psi they were still 3/4 new tread left in perfect nic after 3000kms, great tyre for mid weight bikes



I'm getting the same thing. Running Michelin PR2.

Steve

Im worried now Steve, I have these on the GIXXER (as the PR1 wore out in like minutes) and I commute a lot with that bike, shes heavy and big time power delivery
Im running 40psi on the back, rider and bike 310kg

Pilot Powers on the Duke...rear vanishing fast and I was gonn go to PR2's, but might well resort to Diablo's after reading your comment

Good thread, nice to learn from you guys

[george formby]

I had BT45's on a shaft drive 750 kawasaki a while back & do not recollect any unusual wear. I now like BT021's on my TDM, reasonably good wear, about 6k - 7k for a rear & so far faultless grip. The front & rear both show the signs of a hard ride, the front is rough & you can see on the tread edges that it is pushing. The rear will "blue" & if it's warm enough, do that chewing gum thing & ball up very slightly. I did a trip round europe a couple of years ago & the rear BT021 balled up in the middle after long motorway blasts so I don't think the compound in the middle is that hard.

[MarkW]

I've run BT45 front and rears on my Honda Revere (600cc, 47 japanese ponies and 190kg) and then the D'eauville (650cc, 53 ponies and 240kg) for as long as they have been around. Travelled over 180,000km in total on them. The edges tend to wear out for me before the centres and I get 14,000 - 16000 km from a rear and 16,000 - 18,000km from the front. Pressures are front 31 in the winter and up to 33 or 34 for faster summer work. Rear pressures are 33 winter, 35 summer one up and 36 or 37 for fully loaded summer. Having found what suits my riding I've stuck with what I like.

[Owl]

Dual Compound tyres are designed for the corners

Since when? They all go around corners:laugh:

[howdamnhard]

I had battleaxes, and they wore out within 4km.

I now run Pilot road 2's. They're a good tyre.

Only 4km , how did you get home?:laugh:

Seriuosly I'm also running Pilot Road 2 and after 8000km of mostly commutting and the occasional weekend twisties they are holding up well with no signs of squaring off or scalloping. I'm running the rear at 40psi.