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**lijok** · 03-05-2010, 02:10 AM

Originally posted by theguitarfreak View Post

I........I could only find IRC here in my city at one shop and the shopkeeper is asking 2800 for that. .....

Bro, can you give me details of that IRC tyre? Is it really 110/80, 17 - exact spec of RTR180 rear??? Wow... I'd love to lay my hands on it...

**winzeee** · 03-05-2010, 02:43 AM

Originally posted by lijok View Post

Bro, can you give me details of that IRC tyre? Is it really 110/80, 17 - exact spec of RTR180 rear??? Wow... I'd love to lay my hands on it...

>>http://www.xbhp.com/talkies/universa...tml#post198165

Done almost 25k with it.It holds up pretty well till 20K-22K.

**hypergamer** · 03-05-2010, 07:55 AM

Guys need help !

1) need a pair of lightweight tyres for my 220 front 100 and rear 130 or 140. Please suggest a good profile as I want good grip in corners and dont want the performance to be affected

2) I am in the middle of a project and have a thread in the help me section where am rebuilding my 180 for street riding. I want the bike to look killer so need 130 or 140 rear and 100 frnt again !!!!!!!

please suggest as have to buy these asap

Cheers

Hypergamer

**basumataryraj** · 03-05-2010, 09:18 AM

Originally posted by rahul9985 View Post

I got my 17" 120/90 Sirac for 2550 from tadbund dealer.. The MRP is around 2700 now..

hi rahul, how is the sirac behaving on pukka road. Also Have you done some off roading with this tyre? What was your stock tyre settings? If it was 100/90 did you have to make any mods to get it fitted? Also any noticeable changes in performance? Sorry too many questions. Raj

**theguitarfreak** · 03-05-2010, 11:10 AM

Originally posted by lijok View Post

Bro, can you give me details of that IRC tyre? Is it really 110/80, 17 - exact spec of RTR180 rear??? Wow... I'd love to lay my hands on it...

Ya man. It was really 110/80 17". I was really amazed to find an exact match. But i dont have so much money now after having changed the tyres recently

**chicane1879** · 03-05-2010, 11:17 AM

Originally posted by theguitarfreak View Post

I recently changed my apache 180's tires to MRF Zapper FS and S for the front and rear. Now the problem i am facing is that my bike has lost quite a lot of straight line stability which is easily understandable while riding at low speeds in narrow lanes. I know that is because i have downshifted from 110/80 stock tyre to 100/80 Zapper S. Although the grip of this tyre is awesome, im feeling really uncomfortable at the loss of the stability and hence would like to change back to the stock size.
Now the question is that i dont really have many options if i want to stick to 110. I could only find IRC here in my city at one shop and the shopkeeper is asking 2800 for that. Thats way to costly for me especially considering the fact that i recently spent money on new tyres. The other option i have is to change back to the stock TVS tyre but i will have to buy a new one again coz i sold off the old one

. And the main problem with TVS tyres are their horrible grip on wet.
The other option i have is to change to 120/80. I have a few options like Zapper C, Dunlop Magic, Ceat. But im skeptical again at the idea of not sticking to the stock size because the chassis is not built for this size.

So what would you guys suggest me other than sticking to the Zapper S? What will be the pros and cons of putting a 120 section and if it is advisable then which one to go for?

See this is why i was so skeptical about the R15 tyres performance on the 180. Well then, tough luck. You now have two options:

Keep riding for some more months and when you have the money you can replace it with the IRC

or As the R15 tyres are in huge demand, you can immediately sell it and settle in for IRC.

Btw, For how much did you sell the TVS tyres?

**theguitarfreak** · 03-05-2010, 11:37 AM

Originally posted by chicane1879 View Post

See this is why i was so skeptical about the R15 tyres performance on the 180. Well then, tough luck. You now have two options:

Keep riding for some more months and when you have the money you can replace it with the IRC

or As the R15 tyres are in huge demand, you can immediately sell it and settle in for IRC.

Btw, For how much did you sell the TVS tyres?

For a mere 300 for both the front and the rear.

**Bunny** · 03-05-2010, 12:42 PM

Originally posted by basumataryraj View Post

hi gaurav, I have a question for you. My stock settings are 100/90 18. As mentioned above I can go 4 a sirac. However, you mentioned that the new tyre will be wider and taller. I understand that the section width will increase to 120 from 100. However, the section height will decrease from 90 to 80. Correct me if i am wrong. I dont want height of the bike increased as it is already very high. Also, somewhere in the internet i find people using michelin tyres as tubeless although they are tube type. What is your take on this? Finally other than sirac is there any other dual purpose tyre from michelin in india? Raj

Raj, your bike's height will definitely go up.
On stock tyres, the section height is 90% of 100mm : 90mm x 2 : 180mm
On the Sirac's, the section height is 80% of 120 : 96mm x 2 : 192mm.

So basically, the height goes up by 12mm or 1.2cm. Correct me if I am wrong here.

Other than the Sirac, M45 too is dual purpose.

**rajesh1136** · 03-05-2010, 12:44 PM

Originally posted by theguitarfreak View Post

For a mere 300 for both the front and the rear.

you dint get tubeless for 180 ? i see in site they mentioned as tubeless.

Jus for 300 ? for that you could have kept it yourself for situations like this.

**dcs** · 03-05-2010, 12:50 PM

Originally posted by Bunny View Post

Raj, your bike's height will definitely go up.
On stock tyres, the section height is 90% of 100mm : 90mm x 2 : 180mm
On the Sirac's, the section height is 80% of 120 : 96mm x 2 : 192mm.

So basically, the height goes up by 12mm or 1.2cm. Correct me if I am wrong here.

Other than the Sirac, M45 too is dual purpose.

Now I dont understand why do we multiply it with 2. the bike height would depend on the distance from the axle to the ground and not the Diameter of the tyre. So 100/90 = 90% of 100 mm = 90mm & 120/80= 80% of 120 mm= 96 mm. hence the substantial increase in the height would be 6mm. Correct me if I am wrong

**GoGreen** · 03-05-2010, 01:02 PM

Originally posted by riazmomin View Post

Thanks for the information. I will contact Rajesh.

I had a vist to a tire shop. He quoted following rates for M45 series.

M45 2.75 18" Rs 1400/-
M45 3.00 18" Rs 1600/-
M45 3.25 18" Rs 1800/-
M45 4.00 18" Rs 2000/-

And Sirac 18" as Rs 2400/-

Prices slightly higher.

DESCRIPTION Range MRP
2.50 - 18 45S REINF M45 TT E2 M45 1,105
2.75 - 18 48S REINF M45 TT E2 M45 1,270
3.00 - 18 52S REINF M45 TT E2 M45 1,380
3.25 - 18 59S REINF M45 TT E2 M45 1,660
4.00 - 18 64S M45 TT E2 M45 1,975
2.75 - 18 48P REINF M62 GAZELLE TT M62 1,275
3.00 - 18 M/C 52P REINF M62 GAZELLE TT M62 1,395
2.75 - 18 48P REINF M35 TT M35 1,270
3.00 - 18 52P REINF M35 TT M35 1,380
3.00 - 18 M85 H210 M85 1,430
120/90 -17 64T SIRAC Sirac 2,765
120/80 - 18 62T SIRAC Sirac 2,795

Unable to put the PDF price List as its 100kb as against 20 kb allowed. So pasted the prices for AP. Negotiate with the Dealer and he will provide the prices as per this price list.

Use my reference in case there is any issue.

**GoGreen** · 03-05-2010, 01:49 PM

Originally posted by dcs View Post

Now I dont understand why do we multiply it with 2. the bike height would depend on the distance from the axle to the ground and not the Diameter of the tyre. So 100/90 = 90% of 100 mm = 90mm & 120/80= 80% of 120 mm= 96 mm. hence the substantial increase in the height would be 6mm. Correct me if I am wrong

The height will depend on the distance from the axle to the ground and from axle to the top (towards the seat ). That is why it is multiplied by 2.

**GoGreen** · 03-05-2010, 01:52 PM

Originally posted by Bunny View Post

Raj, your bike's height will definitely go up.
On stock tyres, the section height is 90% of 100mm : 90mm x 2 : 180mm
On the Sirac's, the section height is 80% of 120 : 96mm x 2 : 192mm.

So basically, the height goes up by 12mm or 1.2cm. Correct me if I am wrong here.

Other than the Sirac, M45 too is dual purpose.

You are right about the measurements.

M45 is for urban use and not meant for Off Road terrain unlike Sirac which is at ease in both On Road and Off Road conditions.

**dcs** · 03-05-2010, 02:56 PM

Originally posted by GoGreen View Post

The height will depend on the distance from the axle to the ground and from axle to the top (towards the seat ). That is why it is multiplied by 2.

I still dont understand and beg to differ.

The height of the bike depends upon the distance from ground to axle.that would more or less be the radius of the entire tyre set up. Cant still figure out how would the diameter of the entire section come into picture and affect the set up. I am not being stub-born , just being inquisitive.

I would love to get a detailed info on this by someone who knows it well. OLD FOX, are you listening?

**Praful** · 03-05-2010, 03:06 PM

^^ I think the confusion here is that maybe you two are referring to two different things.

1. The ride height will increase as much as the radius of the tyre has increased.
2. But the effect on gearing will depends on overall diameter which is radius x 2.

Does this solve anything?

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