FrogEye tyres

[Michael47]

G,Day All
The rubber on my FrogEye is past best buy date and I am going o buy new tyres .I run the 145/13 now but have found 155/80/13 that looks good .Question will these fit without clearance problems?
Thanks
Michael

 

[Desert Rat]

I have 155/80/13 on my Frogeye and have no fitment or clearance issues.

 

[Michael47]

I have 155/80/13 on my Frogeye and have no fitment or clearance issues.

Great that i what I wanted to hear!
Thanks
Michael

 

[Keith_M]

155's will fit just fine, and in my opinion they look a little better than 145's.
Keith

 

[Michael47]

Thanks Keith I am going out tomorrow to buy the 155

 

[twas_brillig]

We're running 80 profile 155 - 13 Toyo tyres. I believe that these are pretty much an exact match for rolling diameter to the original specified tyres and work just fin. In yuears/decades past, I've occasionally rubbed the inside of tyres on the rear suspension, but either these ones fit better or I've gotten older & slower.
A quick check for your frame alignment is to look at the clearances on opposite lock at the front. I tried some wider rims/tyres on ours years ago, and one side rubbed and one didn't - still haven't got 'round to taking it to a frame shop for them to have a look-see.

 

[Michael47]

thanks I am getting them mounted this weekend and will check clearnce

 

[wgtolhurst]

Out of curiosity, what tyre pressure will you be using on the new tyres,

Thanks Bill

 

[twas_brillig]

The shop manual provides pressures for both bias and radial ply. I'll have a look-see tomorrow and advise.

 

[wgtolhurst]

I have mine set at Rear 28 psi Front 30 psi. on my 59 Bug-eye. 175/70RS-82H

The Haynes manual states Rear 24psi Front 22psi which seems a little low.

With the advances of the modern tyre. Have the recommended pressures changed?

Thanks Bill

 

[twas_brillig]

Looks like I was wrong (again!) regards shop manual specifications for radials.
Owner's manual for a BE (under 'Data, General')
Gold Seal: Front 18 psi; rear 20 psi regular driving; 'sustained' speeds (in excess of 80-85 mph): 24 front and 26 rear
Cold Seal C41: Front 18 psi; rear 24; 'sustained' 22 and 28 psi
The Factory shop manual gives the 18 and 20, and the 24 and 26 figures
My Haynes manual advises 18 for crossply tyres, with 22 front for high speed; 20 for rear normal load/driving; 24 for maximum load/normal driving; 28 for sustained high speed
For radials, they recommend 22 front (normal driving and both regular and maximum load) with 28 for high speed; 24 for normal load/driving for rear; 26 for normal driving/maximum load, and 30 for the rear for high speed driving.
I think I've traditionally run 22 and 24 psi, but need to find some more notes. Somewhere.
And I'm not too worried about premature wear: it's the years that cause tyre replacement normally for us.
I tried a search on tyre pressures for MG Midget and got 82,000 hits, so would appreciate someone reading and summarizing...
On the Speewell Engineering site, I ran across: "Believe it or not, if you’re running a modern tire of just about any size on a Spridget, you actually want to be running about 18-20 psi cold on the side-curtain cars, and 20-22 psi on the roll-up window cars since they weigh a bit more. Aside from riding more smoothly at the lower pressure, you most likely find it to be less “darty” over bumps and will stick to the road so much better."
We've got a Meyers Manx clone dune buggy with the normal humongous 15 inch x 7" rims and appropriate tires, and I'm running 18 front and 22 rear for a car that weighs the same as our Sprite - and the pressures have no real science behind them, but seem to work.

 

[wgtolhurst]

Thanks for all the info. When I first got the bug-eye the tyres were at 36psi rear and 38 at the front. Obviously this gave a very harsh ride and would jump from bump to bump, taking the psi down has helped.

I was worried taking them down to the low 20s, that it would adversely effect the tyres to the point of being dangerous . However after reading your reply I'm going to drop the pressure another couple of pounds, and then maybe another couple after seeing how it rides. I was comparing the pressures to a modern car, forgetting the weight of the car effecting the psi. (I should have had more faith in Haynes)
Good luck on the new tyres.







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