Which way round do the tyres go?
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I've just bought a pair of Continental Ultra Gator Duraskins (700 x 23). Every other set of tyres
I've bought usually has a indicator showing which way to fit for the correct direction of travel,
these don't! Does anyone have any ideas or suggestions? The tread is very similar to the
Specialized Nimbus I've got on my off road bike, so I think it may be almost arrow head shape of
the tread pointing forward. On a separate note, in says in very small writing "WARNING: Mount only
on hooked type rim" I've no idea what the heck a hooked or unhooked rim is! The rims I've got are
Alexrims, Ace 18.
Thanks for any info.
Bob wrote:
> I've just bought a pair of Continental Ultra Gator Duraskins (700 x
> 23). Every other set of tyres I've bought usually has a indicator showing which way to fit for the
> correct direction of travel, these don't! Does anyone have any ideas or suggestions?
I've just fitted a pair of them to Mrs Larrington's velocipede and had the same thought, but
concluded that since the grooves are so small, it didn't matter. Whichever looks best.
> On a separate note, in says in very small writing "WARNING: Mount only on hooked type rim" I've no
> idea what the heck a hooked or unhooked rim is! The rims I've got are Alexrims, Ace 18.
Picture a section through the rim. The top of the sidewall is curls over towards the centre to help
retain the bead of the tyre. Back in the mists of time, some rims didn't have this feature and
consequently the use of high pressures could be somewhat fraught. But AFAIK all modern rims are
hooked, and the note is just Conti covering their collective ****.
Dave Larrington - http://www.legslarry.beerdrinkers.co.uk/
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Editor - British Human Power Club Newsletter
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Bob wrote:
> I've just bought a pair of Continental Ultra Gator Duraskins (700 x
> 23). Every other set of tyres I've bought usually has a indicator showing which way to fit for the
> correct direction of travel, these don't! Does anyone have any ideas or suggestions?
Tread direction doesn't matter on-road. I don't know that tyre but generally the tyre label goes on
the right - so that might be a clue if it's got one prominent label.
> The tread is very similar to the Specialized Nimbus I've got on my off road bike, so I think it
> may be almost arrow head shape of the tread pointing forward.
That's the usual way for most tyres.
> On a separate note, in says in very small writing "WARNING: Mount only on hooked type rim" I've no
> idea what the heck a hooked or unhooked rim is! The rims I've got are Alexrims, Ace 18.
Just means it's for modern rims only (yours will be).
~PB
Pete Biggs must be edykated coz e writed:
> Bob wrote:
>> I've just bought a pair of Continental Ultra Gator Duraskins (700 x
>> 23). Every other set of tyres I've bought usually has a indicator showing which way to fit for
>> the correct direction of travel, these don't! Does anyone have any ideas or suggestions?
>
> Tread direction doesn't matter on-road. I don't know that tyre but generally the tyre label goes
> on the right - so that might be a clue if it's got one prominent label.
>
>> The tread is very similar to the Specialized Nimbus I've got on my off road bike, so I think it
>> may be almost arrow head shape of the tread pointing forward.
>
> That's the usual way for most tyres.
>
>> On a separate note, in says in very small writing "WARNING: Mount only on hooked type rim" I've
>> no idea what the heck a hooked or unhooked rim is! The rims I've got are Alexrims, Ace 18.
>
> Just means it's for modern rims only (yours will be).
>
> ~PB
>
>
On the conti's I use they orientate differently depending on which wheel they go on, the "V" tread
points to the front from the top of the wheel for front fittment and to the rear for rear fittment.
Probably wise to check with the manufacturer if the tread looks directional to you.
Ian
They go round and round...
"Bob" <stuart@trainingstandards.vianw.co.uk> wrote in message
news:rAwMa.672$95.302@newsr2.u-net.net...
> I've just bought a pair of Continental Ultra Gator Duraskins (700 x 23). Every other set of tyres
> I've bought usually has a indicator showing which way to fit for the correct direction of travel,
> these don't! Does anyone have any ideas or suggestions? The tread is very similar to the
> Specialized Nimbus I've got on my off
road
> bike, so I think it may be almost arrow head shape of the tread pointing forward. On a separate
> note, in says in very small writing "WARNING: Mount only on hooked type rim" I've no idea what the
> heck a hooked or unhooked rim is! The rims I've got are Alexrims, Ace 18.
>
> Thanks for any info.
Bob wrote:
> I've just bought a pair of Continental Ultra Gator Duraskins (700 x 23). Every other set of tyres
> I've bought usually has a indicator showing which way to fit for the correct direction of travel,
> these don't! Does anyone have any ideas or suggestions?
<de-lurk> With the tread on the outside </de-lurk>
eat
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"Pete Biggs" <news2@pbiggs2000.freeserve.co.uk> wrote: ( Bob wrote: ) > The tread is very similar to
the Specialized Nimbus I've got on my ( > off road bike, so I think it may be almost arrow head
shape of the ) > tread pointing forward. ( That's the usual way for most tyres.
Do you mean underneath the wheel, or at the top of the wheel?
I almost resisted the temptation to mention the leading edge of the brake blocks, so I did.
Pete Biggs wrote:
>
> Tread direction doesn't matter on-road. I don't know that tyre but generally the tyre label goes
> on the right - so that might be a clue if it's got one prominent label.
>
>
Tread direction may not matter on a dry road but on a wet road a tyre fitted the wrong way round
will not get hardly any traction. You need the vees facing the front of the bike when at the top.
This allows water from the middle of the tyre to escape out of the side. If you fit the tyre the
wrong way round it actually pushes water under the tyre and can cause you to aquaplane and possibly
slide off.
Ivor Cave
"Ian" <ihb@btinternet.com> wrote in message news:BB289B64.80DE%ihb@btinternet.com...
> Pete Biggs must be edykated coz e writed:
>
> On the conti's I use they orientate differently depending on which wheel they go on, the "V" tread
> points to the front from the top of the wheel
for
> front fittment and to the rear for rear fittment. Probably wise to check with the manufacturer if
> the tread looks directional to you.
>
Do any of us still believe that directional patterned tread has any significance wrt bicycle tyres?
Tim.
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Bob/Stuart,
Had the same problem with mine, a quick email to Conti's UK supplier soon sorted it.
The 'almost arrow head' shape points forwards for the front tyre and back for the rear.
I think I've still got the pic they sent, let me know if u need it.
Regards
Bob/Bob.
"Bob" <stuart@trainingstandards.vianw.co.uk> wrote in message
news:rAwMa.672$95.302@newsr2.u-net.net...
> I've just bought a pair of Continental Ultra Gator Duraskins (700 x 23). Every other set of tyres
> I've bought usually has a indicator showing which way to fit for the correct direction of travel,
> these don't! Does anyone have any ideas or suggestions? The tread is very similar to the
> Specialized Nimbus I've got on my off
road
> bike, so I think it may be almost arrow head shape of the tread pointing forward. On a separate
> note, in says in very small writing "WARNING: Mount only on hooked type rim" I've no idea what the
> heck a hooked or unhooked rim is! The rims I've got are Alexrims, Ace 18.
>
> Thanks for any info.
On Wed, 02 Jul 2003 18:25:48 +0100, Ivor Cave <ivor@ut2003-server.com> wrote:
> Pete Biggs wrote:
>
> > Tread direction doesn't matter on-road. I don't know that tyre but generally the tyre label goes
> > on the right - so that might be a clue if it's got one prominent label.
>
> If you fit the tyre the wrong way round it actually pushes water under the tyre and can cause you
> to aquaplane and possibly slide off.
True, once you get to about 120mph. Otherwise, not an issue.
regards, Ian SMith
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Ivor Cave wrote:
> Tread direction may not matter on a dry road but on a wet road a tyre fitted the wrong way round
> will not get hardly any traction. You need the vees facing the front of the bike when at the top.
> This allows water from the middle of the tyre to escape out of the side. If you fit the tyre the
> wrong way round it actually pushes water under the tyre and can cause you to aquaplane and
> possibly slide off.
Not true. Bicycles can't aquaplane.
See: http://draco.acs.uci.edu/rbfaq/FAQ/8b.13.html
~PB
"Oliver N Durrabridge" <ivor@ut2003-server.com> wrote in message
news:l7hbt-qud.ln1@ut2003-server.com...
> Pete Biggs wrote:
>
> >
> > Tread direction doesn't matter on-road. I don't know that tyre but generally the tyre label goes
> > on the right - so that might be a clue if it's got one prominent label.
> >
> >
>
> Tread direction may not matter on a dry road but on a wet road a tyre
fitted
> the wrong way round will not get hardly any traction. You need the vees facing the front of the
> bike when at the top. This allows water from the middle of the tyre to escape out of the side. If
> you fit the tyre the wrong way round it actually pushes water under the
tyre and
> can cause you to aquaplane and possibly slide off.
>
> Ivor Cave
Thank you for your contribution, backed up by a convincing example.
I now see the error of my ways in just having got a bike with slicks, and will promptly phone all
those of my friends who I poo-pooed when they told me I couldn't grip, and apologise humbly, even
though the evidence so far is to the contrary, even going through muddy puddles (but I wouldn't take
it further offroad than a towpath)
Ambrose
> Do any of us still believe that directional patterned tread has any significance wrt
> bicycle tyres?
Might be significant off road.
~PB
"Ivor Cave" <ivor@ut2003-server.com> wrote in message news:l7hbt-qud.ln1@ut2003-server.com...
> Pete Biggs wrote:
>
> >
> > Tread direction doesn't matter on-road. I don't know that tyre but generally the tyre label goes
> > on the right - so that might be a clue if it's got one prominent label.
> >
> >
>
> Tread direction may not matter on a dry road but on a wet road a tyre
fitted
> the wrong way round will not get hardly any traction. You need the vees facing the front of the
> bike when at the top. This allows water from the middle of the tyre to escape out of the side. If
> you fit the tyre the wrong way round it actually pushes water under the
tyre and
> can cause you to aquaplane and possibly slide off.
>
> Ivor Cave
Ivor, you're full of ****.
Tim.
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"Pete Biggs" <pLime{remove_fruit}@biggs.tc> wrote in message
news:bdva2n$1153bu$1@ID-144931.news.dfncis.de...
> > Do any of us still believe that directional patterned tread has any significance wrt bicycle
> > tyres?
>
> Might be significant off road.
>
Yup - I wasn't thinking of off road biking, but that's just my narrow-mindedness!
Tim.
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On Wed, 2 Jul 2003 20:02:03 +0100, "Pete Biggs" <pLime{remove_fruit}@biggs.tc> wrote:
>> Do any of us still believe that directional patterned tread has any significance wrt
>> bicycle tyres?
>
>Might be significant off road.
My wet weather / serious mud off-road front knobblies have large triangular centre knobs. If you run
it backwards, the mud traction is unchanged. But on tarmac it vibrates considerably when rolling
straight, is unstable for tracking straight on its own (it tends to "fall" into a slight turn) and
it leaps sideways on braking ! Right way round it's fine (except for the sheer lack of rubber area
making it lethal on wet tarmac).
On Wed, 2 Jul 2003 20:00:34 +0100, "Pete Biggs" <pLime{remove_fruit}@biggs.tc> wrote:
>Not true. Bicycles can't aquaplane.
What about minimal contact area mud knobblies ? They're lethal on wet tarmac - is this aquaplaning,
or something else ?
Originally posted by Andy Dingley
On Wed, 2 Jul 2003 20:00:34 +0100, "Pete Biggs" <pLime{remove_fruit}@biggs.tc> wrote:
>Not true. Bicycles can't aquaplane.
What about minimal contact area mud knobblies ? They're lethal on wet tarmac - is this aquaplaning,
or something else ?
It's something else - we experts call it "slipping" or "skidding".
I think aquaplaning happens when surface water can't escape from beneath the tyre fast enough, so the tyre is riding on the surface of the water. I would guess that the causes of skidding are at the molecular scale, those of aquaplaning at a larger scale, but then I'm an ignoramus.
Chris Walker
Andy Dingley wrote:
>> Not true. Bicycles can't aquaplane.
>
> What about minimal contact area mud knobblies ? They're lethal on wet tarmac - is this
> aquaplaning, or something else ?
Something else. Less rubber to grip the road and the knobs squirm about. Despite the road being
slippery, the tyre doesn't skim along on top of a layer of water in the way that car tyres do when
aquaplaning.
~PB
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