Go Back   Team-BHP > Under the Hood > Modifications & Accessories > Tyre & Alloy wheel Section


Reply
 
Thread Tools Search this Thread
Old 15th December 2005, 21:10   #16
sAP
BHPian
 
sAP's Avatar
 
Join Date: Jun 2005
Location: 10000 Lakes
Posts: 272
Thanked: 15 Times
Default Discerning experience from hypothesis

Just want to chime in here... on something that might possibly go overlooked.

I recommend that anyone intending to install alloy wheels make an educated decision before installation. Tire sellers & installers may not be the best judge of your equipment. They were not in my case.

Sometimes research can be confusing, especially when one is also researching through what a whole lot of material on what other people are hypothecating. For this very reason, it is important to gather feedback from real users that have come across real issues and have solved them in real life.

Good luck.
sAP

Last edited by sAP : 15th December 2005 at 21:15.
sAP is offline   Reply With Quote
Old 15th December 2005, 21:44   #17
BHPian
 
Join Date: Aug 2005
Location: Bangalore
Posts: 978
Thanked: 5 Times
Default

completely agree

my previous post mostly belongs to hypothesis part... so be ware readers! put it in the right perspective...
santosh.s is offline   Reply With Quote
Old 16th December 2005, 11:14   #18
BHPian
 
Join Date: Jun 2005
Location: B'lore
Posts: 146
Thanked: 2 Times
Default

Quote:
Originally Posted by sAP
You guessed right. Either of the steps should help.

(i) replacing to 55 profile sounds good enough -- considering you don't need to change the wheel -- results in less than 1% overall diameter reduction

Dia: 23.88" (stock 24.02")
Sidewall height: 4.44 (stock 5.51")

(ii) 16" requires both tire and wheel change, results in less than 1% overall diameter enlargement

Dia: 24.07" (stock 24.02")
Sidewall height: 4.04 (stock 5.51")

I am assuming you have already taken care of lateral clearance issues with the 205mm width. Personally, my choice would probably have been 195/60R15 (dia 24.21" and sidewall 4.61") if that meant not having to use spacers.





sAP

Thanks SAP!.Had zeroed in on the 195/60/R15 option but was wondering on the increase in height due to the 60 profile.That is when I decided to go in for 205/50/R15. Most issues like reduction in pick up, lateral clearance have been solved now(after the hub rings were installed) and due to the contact patch increase, there is considerable grip. Braking distance has increased and do not feel confident when braking. This might also be because of the tire contact patch since it has increased than the earlier stock ones'.
Ajay is offline   Reply With Quote
Old 16th December 2005, 14:24   #19
sAP
BHPian
 
sAP's Avatar
 
Join Date: Jun 2005
Location: 10000 Lakes
Posts: 272
Thanked: 15 Times
Red face Tires and the flywheel effect

Quote:
Originally Posted by Ajay
Thanks SAP!.Had zeroed in on the 195/60/R15 option but was wondering on the increase in height due to the 60 profile.That is when I decided to go in for 205/50/R15. Most issues like reduction in pick up, lateral clearance have been solved now(after the hub rings were installed) and due to the contact patch increase, there is considerable grip. Braking distance has increased and do not feel confident when braking. This might also be because of the tire contact patch since it has increased than the earlier stock ones'.
Ajay, I am reminded of an upgrade I did to my motorcycle tires 4 years ago that resulted in symptoms very similar to yours
  1. Reduced acceleration
  2. Increased braking distance
The upgrade I did was swap a 3.25x18 Michelin M45 rear tire in lieu of my stock 2.75x18 Dunlop Spectra. The culprit is the increased rotating mass (of the larger tire).

However, I kept the larger tire because I got rid of a bigger enemy at the time -- aquaplaning. The new spectra was great on dry road but a nightware in the wet [very unpleasant having to engage an "opposite lock" in traffic, on a 2-wheeler]

sAP

Aquaplaning/ hyroplaning
Opposite lock

Last edited by sAP : 16th December 2005 at 14:25.
sAP is offline   Reply With Quote
Old 22nd December 2005, 19:19   #20
BHPian
 
RedOne's Avatar
 
Join Date: Sep 2004
Location: Bangalore
Posts: 310
Thanked: 19 Times
Default

sAP,

Where can I get these hub rings (in Chennai or Delhi)? I had installed 14" OZ Racing F1 Cup alloys on my OHC. The car has this vibration between 90 and 110 which has been driving me nuts and all the tyre/wheel guys as well as ASS is clueless beyond suggesting the usual balancing & alignment.

Gears,
Red-One
RedOne is offline   Reply With Quote
Old 22nd December 2005, 20:04   #21
sAP
BHPian
 
sAP's Avatar
 
Join Date: Jun 2005
Location: 10000 Lakes
Posts: 272
Thanked: 15 Times
Lightbulb

Quote:
Originally Posted by RedOne
sAP,

Where can I get these hub rings (in Chennai or Delhi)? I had installed 14" OZ Racing F1 Cup alloys on my OHC. The car has this vibration between 90 and 110 which has been driving me nuts and all the tyre/wheel guys as well as ASS is clueless beyond suggesting the usual balancing & alignment.
Redone:

In Chennai, you have 2 options:

(i) approach Majestic Tyres on Casa Major Road (Egmore) meet Anil -- the owner -- and ask him if he can get you centering rings for your car. I got mine from him because I bought my alloys there.

(ii) Better still, Lal's will custom-make them for your car. Will cost you Rs.1200 for a set of 4 rings. 2-nd day delivery.

Navarathan (cell: +91 98400 17171)
Lal Tyre Center, 262-A, Lloyds' Road, Gopalapuram, Chennai 86
Ph: 044 2835 0208 / 0958

sAP
sAP is offline   Reply With Quote
Old 23rd December 2005, 11:12   #22
BHPian
 
RedOne's Avatar
 
Join Date: Sep 2004
Location: Bangalore
Posts: 310
Thanked: 19 Times
Default

Thanks sAP,

I'll check them out when I'm in Chennai in Jan. Hope they don't have to see the car as I am currently in Noida and so is the car.

Gears,
Red-One.
RedOne is offline   Reply With Quote
Old 23rd December 2005, 14:03   #23
sAP
BHPian
 
sAP's Avatar
 
Join Date: Jun 2005
Location: 10000 Lakes
Posts: 272
Thanked: 15 Times
Default Information required for custom rings

You will have to provide the following information to the custom-ring maker:
  1. Hub diameter of your car (from your dealer's service manual, not user manual)
  2. Hub dia (aka center bore) of the alloy wheel (from the alloy wheel supplier)

Both values are expressed in millimeters, example 56.5mm, 73.1 mm, etc.

sAP
sAP is offline   Reply With Quote
Old 23rd December 2005, 14:19   #24
sAP
BHPian
 
sAP's Avatar
 
Join Date: Jun 2005
Location: 10000 Lakes
Posts: 272
Thanked: 15 Times
Lightbulb

Quote:
Originally Posted by santosh.s
one question- league brochure mentions PCD like 100~114.3, does this mean dual pcd 100 and 114.3 or anything in between also??
I think this means the alloys will fit cars with PCD 100 and cars with PCD 114.3, not anything in between. I infer this because my alloys had eight holes in them -- 4 of them were 100 PCD and the other 4 were 114.3 PCD. My car uses 100 PCD, 4-bolt.

sAP
sAP is offline   Reply With Quote
Old 23rd December 2005, 19:45   #25
BHPian
 
Join Date: Aug 2005
Location: Bangalore
Posts: 978
Thanked: 5 Times
Default

I too thought so initially, but I saw such PCD specs even for just one set of holes (i mean 4 or 5, not 8). For example, you can go to following BSA site and see model 801... it has 4 holes but PCD mentioned is 98-114.3 !! Thats what confused me and led me to guess that bolt bores also must be oversized & tapered nuts may be used to "lug-center" such wheels...
http://www.bsa.com.my/web/newfproduct_full.htm

BTW, I asked a person at "hot tracks" in bangalore about this particular centering problem and availability of ready-made or custom rings... but he was not aware of such things... all he said was "no saaar, so many cars, no problem!" What I think is one of the following has to be true-

This problem may not be occuring that often
OR
Usually it may be causing only minor deviations in balance, easily pushed below noticable limit after normal wheel balancing procedure
santosh.s is offline   Reply With Quote
Old 23rd December 2005, 20:51   #26
sAP
BHPian
 
sAP's Avatar
 
Join Date: Jun 2005
Location: 10000 Lakes
Posts: 272
Thanked: 15 Times
Default A few thousand words

Thought I'll post a few pics of my ride. She sails great now. No 65-75mph vibrations.

K-Speed Motorsport,
Classic 5 spoke
13", 4 bolt, 100 PCD
Centering rings, Conical lug-bolt kit
Stock Tires (175/70R13 Bridgestone S322)

It seems my fuel average has gone up after switching to alloys on the same tires. She runs 205kms on 20.3 litres of HP "Power" (versus 186kms on steel wheels earlier on the same gas and under the same conditions)

Love that.
sAP

sAP is offline   Reply With Quote
Old 23rd December 2005, 21:28   #27
sAP
BHPian
 
sAP's Avatar
 
Join Date: Jun 2005
Location: 10000 Lakes
Posts: 272
Thanked: 15 Times
Default

Here's what I'd recommend for you Santosh. Install a set of alloy wheels that you like. Drive around and see if you have a steering vibration in the range of 100kmph (+-10kmph). If you don't, you are fine.

On the other hand, if you do have vibrations, you just need to get rings fabricated at a lathe. They are no big deal to make anyway. Just follow the link in my first post that talks about making custom rings.

PS: Aura makes different sets of the same 13" wheel -- same design, same width, same everything -- but with different PCDs & center bores to match different cars without using centering rings. Depending on which car you have, they ship a different wheel. Could be the same with BSA.

sAP
sAP is offline   Reply With Quote
Old 28th December 2005, 21:47   #28
BHPian
 
islandman's Avatar
 
Join Date: Jun 2005
Location: bangalore
Posts: 94
Thanked: Once
Default

Quote:
Originally Posted by santosh.s
Can any of many baleno owners out there tell me what type of mechanism is used for baleno stock wheels?? and what is the hub size?



A little late but neverthless, Baleno Center bore = 54.0mm

islandman is offline   Reply With Quote
Old 28th December 2005, 21:52   #29
BHPian
 
islandman's Avatar
 
Join Date: Jun 2005
Location: bangalore
Posts: 94
Thanked: Once
Default

Quote:
Originally Posted by santosh.s
Can any of many baleno owners out there tell me what type of mechanism is used for baleno stock wheels?? and what is the hub size?
(hub-centric should be safer, provided proper centering rings are used)
Quote:
Originally Posted by santosh.s
?
A little late but neverthless, Baleno Center bore = 54.0mm
islandman is offline   Reply With Quote
Old 10th January 2006, 14:00   #30
BHPian
 
Join Date: Jun 2005
Location: B'lore
Posts: 146
Thanked: 2 Times
Default Reduced Lancer FE!

Quote:
Originally Posted by sAP
Ajay, your overall tire diameter has reduced from 24.02" to 23.07". Thats almost an inch less than stock. Your tires now need to revolve longer to cover the same distance... and need to rotate faster to reach the same speed.

sAP
The Tire upsize now has resulted in reduced FE. Stock tires- 175/80/R13, Upsized to 205/50/R15. On Shell super unleaded gives me about 9km/litre in B'lore traffic to 11km/ litre before the upsize.
I understand the resulting speedo error, but does the trip meter error out in case of a tire upsize? Is this normal for this kinda tire upgrade or is there someother culprit?Please help clarify.

Thanks.
Ajay 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
Alloy Wheels - Sai Mag Wheels (Rama Road Industrial Area) tsk13 Delhi NCR 37 30th December 2016 17:07
Problem with my i20 head-unit after installing HID's nikibusa Technical Stuff 24 28th February 2014 09:46
Reset ECU after installing K&N PatienceWins Technical Stuff 20 6th July 2010 16:15
Part 2: Update to Solution for vibrations after installing alloy wheels sAP Tyre & Alloy wheel Section 10 17th December 2009 11:20
Vibrations after upsize Knight Rider Tyre & Alloy wheel Section 14 21st June 2006 20:56


All times are GMT +5.5. The time now is 05:36.

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