Quote:
Originally Posted by rjalihal Hey!
- The current batch of XM1 has run about 35,000 kms. They are on the verge of needing to be replaced.
- Spare tyre is the same size (175/65/R15) but the make is Yokohama.
-Spare tyre has never been used much. It only comes when there is a puncture, which recently, was the first time!
So here is the deal. The Yokohama has gone back to being a spare. 3 tires are Michelin XM1 and the front left is Goodyear GT3. I feel no difference whatsoever and plan to continue using it this way. Question: Is this recommended?
Secondly, I want to upgrade to the 195/65/R15 size. I need performance. Mileage I can compromise. Any suggestions? (I am bad with tires). How do I go about it. I am stuck with a brand new GT3 tire now. I bought this as it was the only shop nearby and I feel comfortable when I have 5 working tires. Can I trade it in? It has barely run 100 clicks. I will be upgrading early next month.
And thanks a ton for the link. I got ripped off as i paid Rs3,600 for the GT3 tire while on the website it is just Rs3,251!! Quick question: what does the H 84, H 87, T, 84, etc mean (it is printed after the tire size). Again thanks for your reply!
Cheers!
Rohan |
Hi Rohan
First, you current predicament:
"Is this recommended?"
No
Just to recap: your new GT3 and the Yokohama - both have negligible wear and the 3 XM1s are nearing their end.
On the front, you have a worn out tire that's run 35K on the same axle as a new tire with a full tread - while the difference in diameters of both wheels would be marginal, the difference in grip could be huge. This may not cause a huge perceivable difference under sedate driving (you sure the car's not pulling to one side?), but push the car a little or try breaking hard under emergency and you could end up in deep trouble!
I'd say change your tires now itself.
If you
have to run with this set of tires for another month, a less unbalanced configuration I can think of is XM1s on the front (City's FWD, the front axle
has to be kept balanced) and the Yoko and GT3 on the rear axle (both free rolling wheels and both new tires will have a more closely matched grip/diameter) - though this is also not ideal coz different tire models mean different rubber and hence different grip. The remaining XM1 goes into spare.
Now onto the upsize:
195/65 will be too much of a departure from the stock diameter - stick to 195/60R15s - that's the most accepted ideal upsize for the city I've seen here on Team-bhp.
Brands? Scourge this forum (this thread especially) for all the info. I did the same and shortlisted Michelin Primacy 3STs or Michelin XM2s.
A friendly tire dealer (who is selling both of these at the same price) advised 3STs if you'll be sticking to city driving on good roads only and XM2s if highway/bad roads are expected. (Apparently the 3STs have a softer sidewall than the XM2 which makes XM2 the better choice on less-than-ideal roads)
Now, what to do with the New GT3 and the barely-used Yoko?
I'd suggest buy 5 new tires and trade both old ones in for whatever you get - the GT3 at less than 100KM should go for a decent price while the Yoko may loose a bit more value.
Reason for 5 tires is that you're upsizing now - so it's not just about having a worn out or different brand tire as the spare but a
different size altogether!
[
Dear BHPians, this is a grey area for me and would request the experienced ones to chime in below:
]
IMO,
If you have a flat and need to run some distance on the spare (in the city, it would be a few KMs to the tire repair shop, but on a highway, it could be 10-15 KMs before you come across a tire repair shop):
A rear flat,
The City isn't a RWD and so doesn't have a rear differential which could suffer extra load if running different size wheels on the rear axle, BUT, the ABS would go for a toss and there's no way to know how it will behave in this situation.
Not sure if your City (previous gen?) has ESP - if it does, that'll cause issues too.
A front flat,
There's NO WAY you can have different sized wheels on the front of a FWD car!
For reference, GTO said:
Quote:
Originally Posted by GTO The same size tyre MUST be used on the same axle. Period.
GTO |
And I don't think he means to exclude the spare from the above statement.
I'll let him clarify in case he does.
Now on to those numbers:
84/85/... refers to the Load Index (how heavy a fully loaded car can be for this tire to support)
H/T/V... refers to the speed rating (how fast can you safely run on a tire)
I reckon the City comes with stock tires rated 84H, so any tire with load index 84 or higher and speed rating H or higher should be good.
(Both Michelins I mentioned above are rated 88V)