Is that correct? What is the correct tyre size for the front axle of a TT? Should it be 30x3,5 or heavier? Now it has tyres 820x120 (millimeters) which is the same as 32,3x4,73.
Wheel size Model TT
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Peter_verweij
Topic author - Posts: 2
- Joined: Thu Jan 10, 2019 5:33 am
- First Name: Peter
- Last Name: Verweij
- * REQUIRED* Type and Year of Model Ts owned: TT1923; Touring1923
- Location: Netherlands
Wheel size Model TT
On our 1923 TT, on the front axle it has model T wheels and rims with 4 bolts, on the rear axle it has the usual demountable rims. (6 bolts)
Is that correct? What is the correct tyre size for the front axle of a TT? Should it be 30x3,5 or heavier? Now it has tyres 820x120 (millimeters) which is the same as 32,3x4,73.
Is that correct? What is the correct tyre size for the front axle of a TT? Should it be 30x3,5 or heavier? Now it has tyres 820x120 (millimeters) which is the same as 32,3x4,73.
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A Whiteman
- Posts: 1125
- Joined: Sun Jan 06, 2019 3:36 pm
- First Name: Adrian
- Last Name: Whiteman
- * REQUIRED* Type and Year of Model Ts owned: 1926 TT, 1923 Colonial Roadster, 1924 'Bullnose' Morris, 1925 'Bullnose' Morris, 1936 JD AR
- Location: South Island, New Zealand
Re: Wheel size Model TT
Rear wheels are much heavier than front and different size. They are 20" .
The rim demountable but is a two part with a lock ring. Best to inflate these in a cage (see a google search on lock ring tyre dangers).
The rear axle is much larger and the hub is a heavier part - they are not compatible with car wheels, nor are car tyres possible to fit on a TT rim.
Your rear tyre size is not standard TT, was this size used in European produced TTs?
The rim demountable but is a two part with a lock ring. Best to inflate these in a cage (see a google search on lock ring tyre dangers).
The rear axle is much larger and the hub is a heavier part - they are not compatible with car wheels, nor are car tyres possible to fit on a TT rim.
Your rear tyre size is not standard TT, was this size used in European produced TTs?
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Bud Delong
- Posts: 469
- Joined: Tue Feb 26, 2019 9:09 pm
- First Name: Kenneth
- Last Name: DeLong
- * REQUIRED* Type and Year of Model Ts owned: 1914 touring,1915 roadster
- Location: Wheeler, MI
Re: Wheel size Model TT
There were two TT's on the farm long ago and 60 years years ago there was a 32x6 new tire in the straw mow for one of the tt's.Bud. 
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RajoRacer
- Posts: 5171
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: Steve
- Last Name: Tomaso
- * REQUIRED* Type and Year of Model Ts owned: 1914 Touring, 1919 Centerdoor, 1924 TT C-Cab Express, 1925 Racer
- Location: Longbranch, WA
- Board Member Since: 2001
Re: Wheel size Model TT
A 1923 TT would have had 30 x 3.5 tires on the front with 32 x 4.5 on the rears from the factory - rears could have been changed out or replaced with a 6.00 x 20 - please post a photo for positive ID.