550x19 tyres were factory fitted

[M2M]

Came across in interesting fact while looking into 550x19 bias ply tyres. They were factory fitted at some point during GAZ A production (1932-1936).

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This A has NOS or perhaps new stock tyres (the tyre factory that made the GAZ A tyres still exists today).

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Early production GAZ As were fitted with 475-19 with a design by the Seiberling Rubber Company of Akron, Ohio.

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[Synchro909]

Maybe GAZ wasn't so profit focused as Ford was in the west and so fitted the larger (and better) tyres than they did here. MANY Model A owners here run 5.25X21 tyres on their 28/9 cars. They are so much better that I don't think anybody would go back to the 4.40/4.50X21 tyres. they hold the road soooo much better. I use them on the back and they give an extra 5% roads speed for the same revs.
I think Henry didn't want to spend the extra. Every $ not spent was another $ in his pocket. That said, the speeds at which these cars were driven then were much lower than we do these days.

[M2M]

Originally Posted by Synchro909

Maybe GAZ wasn't so profit focused as Ford was in the west and so fitted the larger (and better) tyres than they did here. MANY Model A owners here run 5.25X21 tyres on their 28/9 cars. They are so much better that I don't think anybody would go back to the 4.40/4.50X21 tyres. they hold the road soooo much better. I use them on the back and they give an extra 5% roads speed for the same revs.
I think Henry didn't want to spend the extra. Every $ not spent was another $ in his pocket. That said, the speeds at which these cars were driven then were much lower than we do these days.

The 4.40/4.50X21 choice was about saving $. Nothing new as Henry put 30x3 front tyres (24" rims) on USA made Model Ts, while rear were the wider 30x3.5 (23" rims), to save a couple of cents. Canadian made Ts, which were sold in Australia, received the wider tyre size both front and rear.

Looking at these pics I think the 550x19 bias ply look good on an A; gives the car a more solid look.

[31 Woody]

According to the owners manual, the Station Wagon should have had 550’s.

[updraught]

So you've got a car with no brakes, no power, stiff steering and aerodynamics like a brick dunny and you want to put power/braking/steering sapping wide tyres on it that will connect with every horseshoe nail in the vicinity.

https://www.drive.com.au/motor-news/...0141004-10qelg

[Synchro909]

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Originally Posted by updraught

So you've got a car with no brakes, no power, stiff steering and aerodynamics like a brick dunny and you want to put power/braking/steering sapping wide tyres on it that will connect with every horseshoe nail in the vicinity.

https://www.drive.com.au/motor-news/...0141004-10qelg

Interesting link! So soon, I will be able to buy tyres for my A at the local tyre store??

[M2M]

Originally Posted by 31 Woody

According to the owners manual, the Station Wagon should have had 550’s.

Interesting. Makes sense because 550s have a higher load rating. Wonder what the judging standards say about Wagon tyre size?