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Midget Tires

Posted by jyankus 
Jason Yankus
Crofton, MD, USA   usa

I want to start shopping tires for the Midget in hopes of getting her back on the road this spring. Where does the community go to buy tires? The tire rack website didn't have anything in 145/70-13.

Any suggestions? Does everyone else just go to the local tire store on the corner and hope they have something in stock?

-jason
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Derek up North Avatar
Derek Nicholson
Sherbrooke, Quebec, Canada   can
1961 MG MGA

I think everyone has gone to at least a 155 tire.
Jason Yankus
Crofton, MD, USA   usa

Staying with the 70 aspect ratio? Or moving up to 80? I can find a lot of 155/80-13. Is that the size everyone is using?
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denns1989 Avatar
Jeremy Callahan
Sault, Ontario, Canada   can

Yes I have looked into this as well, everyone seems to be using 155/80-13 (some even use 165/80-13's but you have to be aware of some possible "rubbing"winking smiley, think you may be able to special order 145's but I'm sure you will pay :-)
owlman Avatar
Noah Deneau
Austin, TX, USA   usa

How about 165/65r13? Those are a wider but I think almost the exact diameter as the 145r13.
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autoist Avatar
Tony Barnhill
Gurley, Alabama, USA   usa

I just got 4 Vredestein Sprints - 145R13 - from Coker Tire....total bill was $340 delivered to my garage in 2 days!

Edited because I hit the wrong key...



Tony Barnhill
Supplying Member: Used Parts for All MG's ~ New Parts for all LBC's
MOSS Distributor & VICTORIA BRITISH Dealer


MG's? YOU NAME 'EM, I GOT 'EM!
http://www.theautoist.com

--------
In addition to the MG's listed on the left:
1971 VW Karmann Ghia
1972 Norton 750 Commando Motorcycle
1973 VW Bug
1982 Mercedes 380SL
1985 Jaguar XJ6



Edited 1 time(s). Last edit at 02/04/2008 03:57PM by autoist.
Jason Yankus
Crofton, MD, USA   usa

Ok. A little more digging...

Using the calculator presented on this site:

http://www.1010tires.com/TireSizeCalculator.asp

I put in our three sizes discussed so far, and one more. It's unbearably hard to read in this format, but here's the data. Looks like 155/65-13 would be the best, but I can't find tires at tirerack.com for that size. 165/65-13 is next best, and there is a tire like that at tirerack. 155/80-13 is a bit out in terms of diameter but has the most selection at the tire website.

145/70R13
Section Width: 5.70 in
Rim Diameter: 13 in
Overall Diameter: 20.99 in
Sidewall Height: 3.99 in
Radius: 10.49 in
Circumference: 65.94 in
Revs per Mile: 990.9
Actual Speed: 60 mph
Speedometer Difference:
Diameter Difference:

155/80R13
Section Width: 6.10 in
Rim Diameter: 13 in
Overall Diameter: 22.76 in
Sidewall Height: 4.88 in
Radius: 11.38 in
Circumference: 71.50 in
Revs per Mile: 913.8
Actual Speed: 55.3 mph
Speedometer Difference: 8.44%
Slow
Diameter Difference: 7.78%

165/65R13
Section Width: 6.49 in
Rim Diameter: 13 in
Overall Diameter: 21.44 in
Sidewall Height: 4.22 in
Radius: 10.72 in
Circumference: 67.35 in
Revs per Mile: 970.1
Actual Speed: 58.7 mph
Speedometer Difference: 2.14% Slow
Diameter Difference: 2.1%

155/65R13
Section Width: 6.10 in
Rim Diameter: 13 in
Overall Diameter: 20.93 in
Sidewall Height: 3.96 in
Radius: 10.46 in
Circumference: 65.75 in
Revs per Mile: 993.7
Actual Speed: 60.1 mph
Speedometer Difference: 0.28% Fast
Diameter Difference: 0.29%
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Jason Yankus
Crofton, MD, USA   usa

Thanks for the tip, autoist.

Here's a link to the product page for those tires: http://store.coker.com/prod/145r13-vredestein-sprint.html

autoist Avatar
Tony Barnhill
Gurley, Alabama, USA   usa

That's them! We're sandblasting & painting my wire wheels right now while we wait for 5 new tubes to arrive from Moss. I thought about going with a larger tire but the 145R13 matches the original 5.20 tire in size.



Tony Barnhill
Supplying Member: Used Parts for All MG's ~ New Parts for all LBC's
MOSS Distributor & VICTORIA BRITISH Dealer


MG's? YOU NAME 'EM, I GOT 'EM!
http://www.theautoist.com

--------
In addition to the MG's listed on the left:
1971 VW Karmann Ghia
1972 Norton 750 Commando Motorcycle
1973 VW Bug
1982 Mercedes 380SL
1985 Jaguar XJ6
roland Avatar
Roland Gotzke
Alberta, Canada   can
1986 Jaguar XJ-SC "Kitty"

I had Cooper 155 80 sr13 tire put on mine. Nicer softer ride.
Mityfast Avatar
Paul Beevor
Barrie, Ontario, Canada   can

I went with 175 70R 13 with Yokohama Avid T4...took a little modification (grinding and cutting around the inner rear fender opening) to keep from cutting rear tires on hard cornering...and only a few swings of a mallet to modify the front inner wheel well so that no rubs...and i am pleased with the ride and handling.

1975 Midget with Minilite clone wheels
owlman Avatar
Noah Deneau
Austin, TX, USA   usa

P.O. put Kelly 165r13 on mine, no problems on fit. I think speedo is off about 5%.
owlman Avatar
Noah Deneau
Austin, TX, USA   usa

Actually, I read that the stock eurometric sizes like 145r13 and 155r14 had an aspect ratio of 82. Is that true for us or was it 70?
cfrench Avatar
Carl W. French
alfred, Maine, USA   usa

Kelvin had written in a good article about MGs and tires that the true aspect ratio was 82



Carl W. French
Alfred, Maine
Southern Maine LBC welfare shelter
67B will be in our will
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M E
Virginia, USA   usa

Here's a question-- can the 155 80 r 13 be used on a wire wheel midget? Specifically, do any problems arise from pairing a standard sized tube with a slightly larger than stock tire?



Edited 1 time(s). Last edit at 02/24/2008 11:01PM by superkaz661.
AtRo Racing Avatar
Rob Rossiter
Branford, Connecticut, USA   usa

In reply to # 725811 by autoist I just got 4 Vredestein Sprints - 145R13 - from Coker Tire....total bill was $340 delivered to my garage in 2 days!

Edited because I hit the wrong key...

How do you like these tires and how do they handle on dry pavement? I have never heard of them.

Here is a link to Moss discussing tire sizes:Modern tire sizing vs OEM



Rob Rossiter
AtRo Racing Products
55 Featherbed Lane
Branford, CT 06405
AtRoRacing@ Gmail.com
marksmidget Avatar
mark tharp
Hammond, indiana, USA   usa

I have friend who manages a tire store. He said thirteens are becoming difficult to find nobody uses them, he ordered me 155 80 R 13's which fit 1976 Midget rostyle wheels
Midgies Dad Avatar
Ben M
York, Maine, USA   usa
1970 MG Midget "Midgie"

The radial equivalent to the original bias ply 5.20-13 was 145R13 (which was an 80 or 85 series tire) -- they never had 145/70R13's as far as I know. Now everyone runs 155R13 (155/80R13) -- I got five new ones for $150 at Tire Warehouse last summer, they're cheap tires but I'll be putting maybe 2,000 miles a year on them and they'll fall apart before I wear out the tread. (And they're on wire wheels)



Edited 1 time(s). Last edit at 04/11/2013 03:13PM by Midgies Dad.
AtRo Racing Avatar
Rob Rossiter
Branford, Connecticut, USA   usa

What about the following tire. It is the same size as the factory used.

Vredestein Sprint Plus - 145R13
SKU: 506534
Section Width: 5.80
Overall Diameter: 22.30
Construction: POLY/STEEL
Max Load Capacity: 827@32PSI
Recommended Rim Width: 4.00 - 5.00
Tube Type or Tubeless: Tubeless
Price:
$75



Rob Rossiter
AtRo Racing Products
55 Featherbed Lane
Branford, CT 06405
AtRoRacing@ Gmail.com
7mg2 Avatar
Andrew Hardie
Calgary, Alberta, Canada   can
1969 MG MGC GT "Mr "C""
1972 MG Midget

WOW........talk about resurrecting an old thread smiling smiley

FWIW, the original RADIAL for the Spridget was a 145SRx13. Aspect ratio wasn't stated, but was between 80 & 85 depending on tire manufacturer and which tire in their line. BMC/BL used Michelin, Dunlop and Pirelli through the years. My '72 came on Michelin ZX 145SRx13.
Their 165/70SRx13 ZX was within 1/10" rolling radius, and that was what I put on it when the factory tires were gone.
I now run 165/65x14 Bridgestones which I hate, and will be fitting 185'60x14 Pirelli's soon.

Coker has just announced a Firestone which will be available in 145SRx13 See the latest Hemmings or Coker's web page.



Andy

NAMGBR# 20-7738
AMGCRA# 1678
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