Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 29th March 2006, 22:18   #1
BHPian
 
raghuram.cg's Avatar
 
Join Date: Jan 2006
Location: Bangalore
Posts: 171
Thanked: 16 Times
Default 13 inch versus 12 inch wheels for the ZEN

Hi everyone,
As the subject suggests, I want to know why Maruti reverted to the 12 inch wheels with the MPFI ZENs.
2)Where there any specific disadvantages ?
3)Is it safe to replace the 12 inch wheels with 13 inch wheels?

This may have been discussed on the forum already, if someone could direct me to that thread, it will be great.

Thanks in Advance

Raghu
raghuram.cg is offline   Reply With Quote
Old 29th March 2006, 22:54   #2
Distinguished - BHPian
 
Mpower's Avatar
 
Join Date: Mar 2005
Location: Bangalore
Posts: 10,432
Thanked: 1,682 Times
Default

The 13 inchers were getting banged up due to the low profile tires. So they went to 12 with higher profile.
Mpower is offline   Reply With Quote
Old 29th March 2006, 23:10   #3
Senior - BHPian
 
karthik247's Avatar
 
Join Date: Feb 2005
Location: BLR, HYD
Posts: 2,708
Thanked: 16 Times
Default

12"ers means higher profile tyres means better ride.
13"ers means lower profile tyres means better handling.

So u do the math...
karthik247 is offline   Reply With Quote
Old 29th March 2006, 23:29   #4
BHPian
 
Kaizer Sozay's Avatar
 
Join Date: Apr 2005
Location: Melbourne
Posts: 333
Thanked: 4 Times
Default

Hi i have upgraded to 13 inch tubeless tyres on my zen. Ride is great after that, not encountered any problems in the past year. Go in for tubeless tyres they are better
Kaizer Sozay is offline   Reply With Quote
Old 30th March 2006, 07:40   #5
Senior - BHPian
 
kpzen's Avatar
 
Join Date: Oct 2004
Location: Faridabad
Posts: 5,545
Thanked: 1,598 Times
Default

Quote:
Originally Posted by Mpower
The 13 inchers were getting banged up due to the low profile tires. So they went to 12 with higher profile.
Also the cost factor.....
12" rims - 400/-
13" rims - 600/-
kpzen is offline   Reply With Quote
Old 30th March 2006, 08:10   #6
Ram
Senior - BHPian
 
Ram's Avatar
 
Join Date: Dec 2005
Location: Singapore, Mumbai, Nagpur
Posts: 2,165
Thanked: 144 Times
Default

Quote:
Originally Posted by raghuram.cg
I want to know why Maruti reverted to the 12 inch wheels with the MPFI ZENs.
2)Were there any specific disadvantages ?
3)Is it safe to replace the 12 inch wheels with 13 inch wheels?
Raghu
Raghu, manufacturers do not make the typical Indian family saloon for the race track. They are made for normal city roads, with the occasional loose road metal of heterogenous sizes.

If we're lucky enough to only drive on mirror-flat roads (such as race-tracks and expressways), we can afford:

1. Very low ground clearance.
The lowering of center-of-gravity will benefit stability tremendously.

2. Very low profile, very wide tires.
With lower profile tires, we must use bigger wheels to maintain a sensible overall outer diameter(OD).

This will let us take corners at much higher speeds. And since the race-track is free of pebbles, it won't rattle our teeth and bones.

Ferraris, Maseratis and Aston Martins are made for the race track and race-track-quality roads. So they have low ground clearance, low profile Z-rated directional radials and huge alloys.

We see pictures of these cars, get "alloy-happy" and mindlessly equip our four-door economy saloons with "upsized" big alloys and low-profile wide tires. Just to match the looks. And then we suffer terribly rattly rides wondering why?

In fact, I've upgraded from the lower-profile (70%) tires Goodyear 145/70R12-69S on my Maruti 800, to the more comfortable, higher-profile (80%) tires MRF ZVTS 145/80R12-74S.

Positives:
The car now drives like a dream. The ride quality, absorption of noise, vibration and harshness is decidedly superior.
The rough and patchy roads of Pune, are less likely to ding and dent the wheel rims. I plan to change to 12" alloys next.
The ground clearance has gone up by 1.45 cm.
And the overall gearing is now 5.7% taller, so there will be better fuel economy.

And importantly, the bigger wheels donít interfere with the wheel-wells, neither while steering nor while bouncing over a speed-bump. An initial concern which turned out to be a non-issue.

Negatives:
The overall diameter has increased from 507.8 mm to 536.8 mm. This means that the speedometer and odometer indicate readings 5.7% less than actual. When the speedo indicates 100 km/hr, the car is actually doing 105.7 km/hr.
Ram is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Key decision points for Audi A4 versus Mercedes C220 versus BMW 320D ashishkashyap Luxury, Imports & Niche 40 30th April 2017 19:35
Are Indica NA speedos' calibrated for 14 inch wheels? Zappo Tyre & Alloy wheel Section 9 17th June 2010 09:40
Baleno - Rear wheel scrapping with 15 inch wheels sureshshanmugam Tyre & Alloy wheel Section 12 24th April 2009 11:15
Looking for AMG 17 inch Wheels (pic inside) for W124 '96 E220 Screwdriva Tyre & Alloy wheel Section 6 26th August 2008 15:38


All times are GMT +5.5. The time now is 00:58.

Copyright ©2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks