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"Big453, In your opinion will the 165-80-15 tires work on the smart? I would like to have 4 each 5.5 rims plus a spare."

I think you mean 165/60R15 tires. These size tires will fit 4.5" rims better than 5.5" rims. So four 165/60R15 tires on the standard front 4.5Jx15 ET23.5 rims would work plus the same size spare. Vredestein Quatrac 5 are non-directional, so you can fit the spare in any position.

In Europe, Toyota Aygo/Peugeot 108 fits 165/60R15 tires to 4.5" rims as standard.

For comfort, with this tire size, I would go with 23psi front tire pressure and 32psi rear tire pressure. You can increase the front tire pressure to 26psi if you do a lot of fast cornering at the expense of making the ride a little harder. These tire pressures are enough to support the weight of the car, so your tires won't fail even if you drive at the maximum speed rating of your tires. However, as the Smart 451 doesn't go 130mph (H-rated tires) you won't be pushing your tires anywhere near their limits.

Also consider 185/55R15 on four 5.5" rear rims (5.5Jx15 ET22), as there is a larger choice of winter tires in this size.
 

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Big453,
In your opinion will the 165-80-15 tires work on the smart ? I would like to have 4 each 5.5 rims plus a spare.
Thanks!
That is a 25.4" diameter tyre. Assuming a 451: They'll "fit", but they'll rub like crazy unless you have a lift kit or the ED suspension.
You can fit up to 24" tyres with minimal rubbing on a stock 451 suspension.
 

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If you're looking to explore the limit on a standard 451, then you could try 195/60R15 rear tires and 175/65R15 front tires mounted on the standard 4.5Jx15 ET23.5 front rims and 5.5Jx15 ET22 rear rims. A 175/65R15 tire will fit a 4.5" rim, but a tire fitter could refuse to fit it as it's not an officially approved tire size for that size rim. The funny thing is a 185/70R15 tire is an officially approved tire size for a 4.5" rim and is of course even bigger. Don't try that size, the outside diameter is far too big.

A 175/65R15 tire has an outside diameter of just under 24" when new. The radius is about 0.1" more than a 185/60R15 tire. So expect just a little more rubbing than a 185/60R15 tire on the front. However, it might not be worse as the 175/65R15 tire is narrower than the 185/60R15 tire, and the rubbing probably occurs only on full steering lock.

Vredestein Quatrac 5 195/60R15 88H


Vredestein Quatrac 5 175/65R15 84H


I've heard of a couple of owners that have fitted these tire sizes to the later 453 model, but haven't heard of them being fitted to a 451 yet.
 

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That is a 25.4" diameter tyre. Assuming a 451: They'll "fit", but they'll rub like crazy unless you have a lift kit or the ED suspension.
You can fit up to 24" tyres with minimal rubbing on a stock 451 suspension.
Is there a known/approved/used lift kit out there in smartcarland? Anyone using one
?
 

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There's the Daystar lift kit, but it'll set you back $300. You can get a full Tesla ED suspension for less than that from Autobahn Dismantling. Either will make an ICE 451 2 inches taller. As for what rubber bands you can then run? Not sure. I still haven't had my ED suspension installed yet!

Big453's suggestion for 175/65/15s should work. You'll rub on sharp cloverleaf junctions but since the car's plastic the tires will just carve out their own wheel wells eventually. :) My 185/65/15s don't even rub anymore. lol
 

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There's the Daystar lift kit, but it'll set you back $300. You can get a full Tesla ED suspension for less than that from Autobahn Dismantling. Either will make an ICE 451 2 inches taller. As for what rubber bands you can then run? Not sure. I still haven't had my ED suspension installed yet!

Big453's suggestion for 175/65/15s should work. You'll rub on sharp cloverleaf junctions but since the car's plastic the tires will just carve out their own wheel wells eventually. :) My 185/65/15s don't even rub anymore. lol
Thanks for the info. What does the Tesla ED suspension cost? And which models of Tesla?
 

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Best tire for ride... and stability? It doesn’t work that way. You only get one, or you find a compromise. Short sidewall tires at high pressure (40) are great for stability. 4 stock reads are great for ride, but really spongy. What’s important to you?
 
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