Tyre Sizes

[GuiNNeSS]

i didn't claim that you were wrong. just letting the TS know that opinions should be taken into consideration with common sense. btw, i have seen mopeds with same tyre sizes, very much like bicycle tyres. it might look nice to the owners but i seriously doubt their purpose.

 

quoting from enfant ... same thoughts there ...nobody said u were wrong ...i already said if u think ur'e right so be it .. just letting not only TS but others who visit this thread that some opinions by certain individuals should be taken with a truckload of salt ...why u keep trying to prove ur self by saying 1000 gazillon ppl agree with u?

 

btw experienced and ride big bike does not = smart

[shahrul_azmil3]

yup ...

 

i ride a hayabusa ....

 

i'm not smart .....

 

but i keen 2 learn

 

and i share my experience with ppl ....

 

 

 

i want to say ...

 

yes using both same size tires can be done ....

 

buy more malaysian mag n sometimes there's pic on rempits on they class2b "dragbike"

 

handle bar lower down very low until the fork tubes are very near ur neck line

(this one gd luck to u if u happen to have straight impact accident)

 

 

maybe the above is off topic lar ....

 

but they use same size SMALL and THIN tires ....

 

 

yes it's possible but are u confident to use that settings ?

[chanjcv]

haha what about a tw lol! (:

[kito]

A very debating thread forum here.. c'mon guys let's all chill out.. it's a forum.. therefore no right or wrong ans.. It's up to every individual to give their own thoughts and perceptions.. To TS, FOR MYSELF, i don't think it's safe to ride on a rear tyre with e same size as e front.. It would be like doing a "suicidal act".. Imagine u're doing a unfamiliar turn, and halfway through, u found out that u need to corner deeper to execute it perfectly.. Think of that scenario.. As what Sparkers1 state, maybe if they are already accustomed to that set-up, then i guess it's not big of a deal to them.. but to me, it is a risky set-up.. Y risk ir rite? Anyways its kinda nice to see bigger set of tyres for e rear.. just my 5 cents..

[SparkerS1]

haizzz, use same tire for rear u guys say not safe, then use bald tires or small tires, which one not safe, right?

 

haizzz

[Raptor]

hello can any1 explain to me y sumbikes have a smaller front tire and a bigger rear tyre?

 

y not make it the same?

thnx in advance......

 

With regards to a bigger rear tyre.

The bigger the contact patch, the better of transmission of power onto the road during acceleration. Especially so for the high powered machines. Or else alot of unwanted wheel spin during accelerations, see the F1 cars... their rear tyre is bigger than the front... a better example are the dragsters. Wheelspin = loss of grip = slow.

 

With regards to the size of a front tyre.

Rotational mass. It is harder to turn a heavier rotational mass coupled with the gyroscopic effects. And this resistance to turning (change of direction) gets worse when speeds are higher.

A smaller tyre on the front makes the bike easier to turn.

 

Most big bikes have a 120 front, whilst most small bikes use a 110 rear. Yes you can put rear tyre onto a front rim... but the rim size better be able to accept the tyre first.

 

Just be ready to find that the bike is slightly harder to turn into the corners.

Ya you can see alot of small bikes having similarly sized front and rear tyres, only because they are low cc and also they do not run at very high speeds or designed for it eg meant for off roads only.

 

With regards to choice of 'thinner' tyres over 'fatter' tyres... its rolling friction.

The lesser the rolling friction, the greater the speed. Thats whay racing bicycles have such thin tyres compared to a normal bicycle.

 

The geometry of the bike is affected by the profile of a tyre... not the size. Normally putting on a lower profile front or putting on a higher profile rear would make the bike nose low ie quicker steering in the corners.

 

Profile??

A 120/70 tyre means the height is 70% of the width, the width in this case being 120mm.

 

Which grips better, a bald tyre or one with treads??

It is the rubber compound that makes a tyre grip the roads. A bald soft compound tyre will grip a dry road like glue... and these bald tyres are sometimes called slicks.

 

Grooves cut into the tyres aka treads, only serve the function of clearing water from underneath the tyre's contact patch to prevent aquaplaning at high speeds, ie formation of a high pressure water film between road and tyre resulting in loss of grip.

 

Its the rubber compound of the tyre that gives it the grip, not the amount of tread. The lesser the tread or 'balder' the greater the tyre contact patch available on the road, the better the grip. Look at those DOT approved race tyres on the sportsbikes.... look like got very little treads.

 

Disclaimer: No need to get your knickers or undies twisted in knots if you don't agree with my post.... just ignore it and tell yourself I talking cork.

[GuiNNeSS]

With regards to a bigger rear tyre.

The bigger the contact patch, the better of transmission of power onto the road during acceleration. Especially so for the high powered machines. Or else alot of unwanted wheel spin during accelerations, see the F1 cars... their rear tyre is bigger than the front... a better example are the dragsters. Wheelspin = loss of grip = slow.

 

With regards to the size of a front tyre.

Rotational mass. It is harder to turn a heavier rotational mass coupled with the gyroscopic effects. And this resistance to turning (change of direction) gets worse when speeds are higher.

A smaller tyre on the front makes the bike easier to turn.

 

Most big bikes have a 120 front, whilst most small bikes use a 110 rear. Yes you can put rear tyre onto a front rim... but the rim size better be able to accept the tyre first.

 

Just be ready to find that the bike is slightly harder to turn into the corners.

Ya you can see alot of small bikes having similarly sized front and rear tyres, only because they are low cc and also they do not run at very high speeds or designed for it eg meant for off roads only.

 

With regards to choice of 'thinner' tyres over 'fatter' tyres... its rolling friction.

The lesser the rolling friction, the greater the speed. Thats whay racing bicycles have such thin tyres compared to a normal bicycle.

 

The geometry of the bike is affected by the profile of a tyre... not the size. Normally putting on a lower profile front or putting on a higher profile rear would make the bike nose low ie quicker steering in the corners.

 

Profile??

A 120/70 tyre means the height is 70% of the width, the width in this case being 120mm.

 

Which grips better, a bald tyre or one with treads??

It is the rubber compound that makes a tyre grip the roads. A bald soft compound tyre will grip a dry road like glue... and these bald tyres are sometimes called slicks.

 

Grooves cut into the tyres aka treads, only serve the function of clearing water from underneath the tyre's contact patch to prevent aquaplaning at high speeds, ie formation of a high pressure water film between road and tyre resulting in loss of grip.

 

Its the rubber compound of the tyre that gives it the grip, not the amount of tread. The lesser the tread or 'balder' the greater the tyre contact patch available on the road, the better the grip. Look at those DOT approved race tyres on the sportsbikes.... look like got very little treads.

 

Disclaimer: No need to get your knickers or undies twisted in knots if you don't agree with my post.... just ignore it and tell yourself I talking cork.

 

sparkerS1...read the above post 10 times ....and the part in bold 20 times

[darren_soh86]

rxz 135cc, wave 125 cc.

125cc moto GP bikes are meant for racing purposes, not on the road.

TS ask if both tires can be the same, then i reply saying can but only for small bikes.

 

i confirmed wif some of my biking friends already n they have confirmed it can be done, actually no need to confirm wif them as i also know already.

 

safety wise is that cannot corner very low, need to depend on the technique of the rider.

 

i nv advice anyone anything, i only sharing it can be done.

 

did u read carefully or not????

 

alot of riders can support me u know, support me that for small bikes, both tire can be same size.

 

u dun anyhow come n accuse me of anything ok.

 

doesnt mean that u ride big bike or got yrs of riding experience then u know everything.

but i dare to say that i am still learning ok.

 

i haven say anything doesnt mean i stupid ok, is that no point arguing ok.

 

if u that gd, u recommend the tire sizing for the TS's bike.

 

TS, pls state the bike u riding now ok?

 

or else i will be accused for nothing, then no ppl will post to help u also.

 

lol. in your sense... haya oso can use same size tyres for front n rear wat. even can use 90/80 tyres if they wan to..

 

its juz whether u got the balls to ride with that kind of config wat..

 

even if u put bicycle tyres on a haya it still will move.. still can ride oso..

 

and SMALL bikes... can be very subjective.. 125cc? 100cc? 50cc? or even 12cc? how small is small?

 

to me.. haya can be small too.. and haya is not racing purpose too.. so it can run on bicycle tyres?

[SparkerS1]

i wonder if some of u guys ride 2b bikes before, okok i am stupid, u all win, happy? yeah!! very happy

[SparkerS1]

sparkerS1...read the above post 10 times ....and the part in bold 20 times

 

hey u think cls 2b tires use gd compound????

[SparkerS1]

lol. in your sense... haya oso can use same size tyres for front n rear wat. even can use 90/80 tyres if they wan to..

 

its juz whether u got the balls to ride with that kind of config wat..

 

even if u put bicycle tyres on a haya it still will move.. still can ride oso..

 

and SMALL bikes... can be very subjective.. 125cc? 100cc? 50cc? or even 12cc? how small is small?

 

to me.. haya can be small too.. and haya is not racing purpose too.. so it can run on bicycle tyres?

 

u know what u talking about?

pls lah, this forum is to help, but are u helping?

 

size of tire also depends on whether can fit into the rim or not leh.

 

i talk about 2b bikes, then u come out haya.

 

nvm, u guys are the best, very knowledgeable, i know nothing, i dun qns the qns next time, let those who ride cls 2 bikes ppl n super lao jiaos qns n help can liao.

 

so all newbies dun come in n post anything to protect yourself from all these bombardment.

 

btw thanks for the comments that will help the TS.

[SparkerS1]

moderator pls close this thread as the qns on tires size is too broad, as TS also nv state for which bike.

 

as what i have seen, most of the riders in the forum nv use same tire size during their cls2b.

 

for me although i have only own 2b bikes, i can say that is i have fixed 80/80 for front n rear for my rxz.

 

ok ppl, end of story, believe it or not is up to u.

[darren_soh86]

lol. if u cannot take other ppl's opinions.. then probably u shdnt be speaking in a public forum..

 

wateva ppl propose in this thread u oso wan to rebut irregardless whether they are right or wrong... did any of us mentioned u were wrong? we only felt that it would generally be safer for the machines' geometry..

 

:bow:

Lets juz all hail to the mighty sparky guy~

Most knowledgeable newbie on Earth.

[natgw]

congrats sparkers1....

[MC28]

All i can say is the manufacturer didnt spend the money to design the bike and give you different sizes for front and rear for nothing..

[shahrul_azmil3]

most here did not say u wrong

 

and cannot be fit

 

juz unwise

 

 

 

off topic

 

same goes for fat tire kit for busa ....

 

unwise (if no turbo or nos install)

[GuiNNeSS]

hey u think cls 2b tires use gd compound????

 

im reminding you about your advise to someone whereby u said " ALL tyres that are not bald are good tyres"

[SparkerS1]

im reminding you about your advise to someone whereby u said " ALL tyres that are not bald are good tyres"

 

 

Grooves aka treads on the tire surface only serve the function of clearing water from underneath the tyre's contact patch to prevent aquaplaning at high speeds, ie formation of a high pressure water film between road and tyre resulting in loss of grip.

 

in SG, mostly is wet weather like nowadays, so i am wondering, bald tires can still make it?

 

i am not saying who is right or wrong ar, i only asking if bald tires can make it in wet conditions, bald as i mean no treads at all or very little treads marking

[elbambino]

wah.. its hot in here..

 

hehehe.. my view.. nothing wrong using same size front n rear, tp wont tahan u.. just dont play corner too much lah.. maybe higher chances ur rear buang... higher chances, but doesnt mean confirm 100% buang.. this i believe due to the weight distribution..

 

maybe its not bout small cc.. its abt light bikes.. their weight in general.. 90-120kg quite light right..

 

motogp racing sia.. y compare?

 

some people told me they use same size front n back to minimalise their weight.. sotong tyres.. but they also can corner.. crazy people.. hehe but for me personally i use a fatter rear..

 

talking abt manufacturer decision to use those stock kinda of tyres, sumtimes wat they put on the bike doesnt mean its the best.. most the quality not so good.. bcos they have to bring down the overall price of the bike so that its sellable.. hehe..

 

spark135 the standard stock tyres front 70/100 rear 80/90... wah the front feel very light.. very wobbly at high speed.. dont dare to corner..

 

hmm.. anyway, the TS only asked y rear fatter on most bikes.. not can fix or not..

 

hmmm i tink i'm off topic already.. ok i shut up now..

[kito]

Chill out guys..???

[MC28]

Manufacturer tested the bike on the recommended sizes, aint talking bout compounds thou cos we all know that they r giving lousy kinds..

[elbambino]

k i shut up now.. newbie here..

[MC28]

Bro,no need to shutup one..We are all here to share views/opinions..

[DM]

yeah and it's obvious that some posts are to be taken with a pinch of salt. i don't like what some other people post but i don't turn defensive or aggro towards them. i post my opinion, they post their opinion, we don't agree, so be it. no need for the insults and sandbox attitude.

[Raptor]

It took me years to learn about bikes and their performance and how to set up the suspension. It took me years to learn how to ride bike fast on the tracks. I learnt alot through my own trial and errors and I also learnt alot from listening to those who know.

 

The point is... up till today I am still learning. Everybody is learning.

 

Experience is the best teacher... but most unforgiving.