[arjunrudra]

It would definitely be shown and you will feel the drop in power.I have had a few friends who have gone back to 15 inchers from the 17.
They also complain of the ride on 17.

[Berj79]

Originally Posted by arjunrudra

It would definitely be shown and you will feel the drop in power.I have had a few friends who have gone back to 15 inchers from the 17.
They also complain of the ride on 17.

if u stick to the actual stock tire diameter then 225 should be ok, u wont get a noticable power drop but the ride will be firmer for sure..

[dinu2506]

Originally Posted by iTNerd

Hey guys.. just to let you know that I upsized my Civic's shoes to Michelin Primacy LC 205/65/15 just out of the showroom.. and what I can say - So far, I am very statisfied with them.. it delivers on the 3 promises - better FE, lower noise and very comfortable ride without compromizing on handling... the only drawback is the looks.. it is not a good looker.. if you are looking for comfort, better FE, I would recommend Primacy LC

on 30 psi, got around 12.8 for the first 500 odd kms..
on 32 psi, got around 13.7 for the next 236 kms...

PS. @dinu2506 - As there is a 2% speedo error, how much would my effective FE would be, according to the reading?

Thats fantastic FE if it is driven in city, something unheard of. If on the highways, its probably normal. Can you confirm that.
For the 2% error, multiply the calculated FE by 1.02.

[rr_zen]

Originally Posted by iTNerd

Hey guys.. just to let you know that I upsized my Civic's shoes to Michelin Primacy LC 205/65/15 just out of the showroom.. and what I can say - So far, I am very statisfied with them.. it delivers on the 3 promises - better FE, lower noise and very comfortable ride without compromizing on handling... the only drawback is the looks.. it is not a good looker.. if you are looking for comfort, better FE, I would recommend Primacy LC

on 30 psi, got around 12.8 for the first 500 odd kms..
on 32 psi, got around 13.7 for the next 236 kms...

If I may add, you missed out on the 4th promise, the improved GC.

By the way, great FE figures there. Congrats. I had a look at the Primacy LC on the Michelin website and they dont look bad IMO. Can you post some pics please ? And I suppose, it is about time too.

[iTNerd]

Originally Posted by dinu2506

Thats fantastic FE if it is driven in city, something unheard of. If on the highways, its probably normal. Can you confirm that.
For the 2% error, multiply the calculated FE by 1.02.

Yes, mostly driven on City condition (70% approx), but not in peak traffic hours.. and NCR has few red lights now with lot of flyovers.. so, no idling..

so adding the error margin (FE X 1.02):
on 30 psi, got around 13.05 for the first 500 odd kms..
on 32 psi, got around 13.97 for the next 236 kms...

Too good to be true!
Anyway, anything more than 10/11 kmpl is good enough for me...

[Vid6639]

There is an error in upsizing agreed and due the error it will show better FE.

Actually FE will not be better as the broader tyres reduce the mileage and more or less compensate for the speedo error.

[rr_zen]

Question to all you upsizing fans - Does the upsizing to 205/65/R15 void the manufacturer's warranty on anything at all ? I tried finding an answer for this question in the last few pages of this thread but in vain.

Am sure you would have checked with the dealer on this one. What is his take on this? Thanks.

[dinu2506]

Next FE update. 249km, 24.5 lit = 10.15km/lit. Adding the error it is 10.35km/lit. The smile continues

[rr_zen]

@dinu: Fantastic ! This shows consistency in the FE figures. Am sure you would be able to squeeze out a little more (if you really want to though)
by being more conscious about stepping on the gas.

By the way, can someone respond to my earlier post on warranty being void on upsizing?

[Berj79]

Originally Posted by rr_zen

@dinu: Fantastic ! This shows consistency in the FE figures. Am sure you would be able to squeeze out a little more (if you really want to though)
by being more conscious about stepping on the gas.

By the way, can someone respond to my earlier post on warranty being void on upsizing?

each car company have their own policys, check with honda & see what they have to say about it..

[rr_zen]

Originally Posted by Berj79

each car company have their own policys, check with honda & see what they have to say about it..

Your reply adds little value. My question was to the current Civic owners who have gone in for upsizing. It would benefit the forum members to know from each of the Civic owners on their experiences than me checking with the dealer myself.

[iTNerd]

Originally Posted by rr_zen

Your reply adds little value. My question was to the current Civic owners who have gone in for upsizing. It would benefit the forum members to know from each of the Civic owners on their experiences than me checking with the dealer myself.

I asked the Salesman when purchasing the car about the warranty terms on tyre upsize and he mentioned of warranty void on suspension.. but later on, when I threatened to opt for Altis, he relented to saying its no problem as long as I use the same OEM rims/alloys.. don't think he knew what he was talking about... but I didn't care a hood for it..

[iTNerd]

I am unable to find the correct PSI to be maintained on the Michelin Primacy LC.. In Michelin/Paultan.org websites, they mentioned that test was done on 2007 iVTEC 1.8 using LC with 2.4 bar pressure on all tyres..

From tyre pressure conversion calculator (posted by tsk1979 http://www.team-bhp.com/forum/tyre-a...alculator.html), 2.4 bar corresponds to 35-36 psi.. I am currently maintaing 30 psi.. Any ideas if I should try 35 psi to get most of the primacy LC's promise? Bear in mind, that I have upsized to 205/65/15.. Any advise?

Michelin claims a reduced rolling resistance of 13% compared to the MXV8, as a result of testing conducted on a Honda Civic 1.8 i-VTEC using 2.4 bar tyre pressure on all four tyres. Michelin also recorded reduced dB levels for road and tread noise compared to the MXV8.

[ST7677]

35 psi will give you lesser rolling resistance and more FE, but it will kill your tyre faster than you can imagine.

Talking from personal experience. I had 35-36 psi after servicing from Dakshin Honda, I did a 2000 km drive with that and my centre portion of the tread was gone!!!

[dinu2506]

Originally Posted by dinu2506

Next FE update. 249km, 24.5 lit = 10.15km/lit. Adding the error it is 10.35km/lit. The smile continues

Filled up again, 407km with 38.45 lit - 10.6 km/lit. Factor in the speedo error of 2%, its 10.8 km/lit. Good going . I filled her today with Shell Super Unleaded after a long time. Will update if there is any difference