Unidirectional tyres – OLD Bull Trailriders

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February 15, 2009 at 3:18 am #95870

Mick D
Member

I have been down the shed having a bit of a cleanup and there are several used tyres in there.
Some of them still have more tread on them than the one that is on my bike.They are all Bridgestone ED12’s which are unidirectional tyres,what happens if I put them on the other way round? The reason I ask, they have a better edge on them if put on the wrong way.
Has anyone got any experience in this?

February 15, 2009 at 3:22 am #122557

David
Member

Mick, Directional tyres will have an arrow indicating the way they are designed to go and unidirectional can be put on either way, you will just move the better edge around to get more life out of the tyre, usually when you turn a uni around you get the drive back but then the braking suffers….you get nothing for nothing my friend…..are you up for a wet night ride

February 15, 2009 at 3:44 am #122558

Anonymous

micknmeld wrote:

Quote:

,what happens if I put them on the other way round?

Be very wary. The bike may have a tendency to go backwards. To maintain even tyre wear on the bike, it could pay you to rotate the tyres from front to rear.

These ideas are only theory and made not be necessarily be correct.

February 15, 2009 at 5:24 am #122563

Anonymous

slug wrote:

Quote:

micknmeld wrote:

Quote:

,what happens if I put them on the other way round?

Be very wary. The bike may have a tendency to go backwards. To maintain even tyre wear on the bike, it could pay you to rotate the tyres from front to rear.

These ideas are only theory and made not be necessarily be correct.

I’m with slug rotating the front/rear is the way to go :laugh:

February 15, 2009 at 5:43 am #122559

Anonymous

On a serious note, that is what most of us frugal riders do to get more out of the tyre. In the olden days, I had been known to even cut the blocks by using a very sharp knife and WD40 as a lubricant to slice off the leading face of the knobs to give it a new sharp edge.

February 15, 2009 at 5:48 am #122568

Anonymous

Squaring the knobs off a tyre is a good way to get a few more decent K’s out of a worn tyre. I don’t know how you were rotating tyres though???

February 15, 2009 at 6:21 am #122571

Mick D
Member

Thanks guys,I never gave the braking a thought,I was only thinking of drive traction.
Hey dave are you still getting a tyre groover?

Oh yeah this is the context I was using the work unidirectional
Adj. 1. unidirectional – operating or moving or allowing movement in one direction only

February 15, 2009 at 8:42 am #122560

Nick Again
Member

Yep, I’ve even drilled holes in em and screwed bolys in to them for another ride…I claim NO responsibilty if anyone tries this and rides on blacktop!! Trust me..most things I did as a kid I have moved on from as an adult!

February 15, 2009 at 8:52 am #122586

Eric Smith
Member

Mick, if it is an ED12 you can take to it with an angle grinder. I did with the one I gave to TB to put some square edges back on it. Didn’t help, I think the compound of ED12’s is too hard. It also nearly wore out the grinder disk doing it!

February 15, 2009 at 8:55 am #122589

Greg
Member

Has anyone ever heard the arguement that there is more traction with a half worn tyre on a hard pack track then a new sharp edge tyre?

February 15, 2009 at 9:07 am #122590

Eric Smith
Member

Heard it. I say it depends a lot on the compound of the rubber. An awful lot. That ED12 was terrible once it got down a bit, but my Maxxis which replaced it was great, even once it was nearly shagged.

February 15, 2009 at 9:08 am #122561

Dwayne O
Member

YEP, I heard that one from CHAMPO the wise OBT racer :laugh:
First day I met him at Kurri MCC when he found a discarded tyre on the ground & was contemplating using it,,, can`t remember whether he took it home or not:dry:

February 15, 2009 at 11:05 pm #122593

Anonymous

EAGLE`02 wrote:

Quote:

YEP, I heard that one from CHAMPO the wise OBT racer :laugh:
First day I met him at Kurri MCC when he found a discarded tyre on the ground & was contemplating using it,,, can`t remember whether he took it home or not:dry:

i actually took home about 5 tyres that day
we got a knobby for racytracy
some trials tyres for dirt track’n
a worn racing wet tyre cause it was cool
a new ‘old school’ dirt tracker for moto’s project bike

February 15, 2009 at 11:48 pm #122591

Anonymous

Trailboss wrote:

Quote:

Has anyone ever heard the arguement that there is more traction with a half worn tyre on a hard pack track then a new sharp edge tyre?

It’s beacuse you have a larger contact area with the ground. This isn’t required in the slippery stuff, grippy square edged knobs are
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