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MG MGB Technical - tyre sizes
|I want to put alloys on my 'B (currently wires) and have been offered some Minators fitted with 185/70 R14 Federal Super Steel 731 tyres. I had considered fitting 165s if I had bought new. What difference will I notice between these two tyre sizes? Also anyone heard of these tyres?|
At speedometer readings of 60 MPH and 100 MPH, a 165/80 will give 58.5 MPH and 97.4 MPH, respectively.
At speedometer readings of 60 MPH and 100 MPH, a 185/70 will give 58.9 MPH and 98.2 MPH, respectively.
All other factors being equal, the 185/70 should give a smoother ride and better grip. I thought Federal went out of business years ago!
|I have 195's on my 1979 with Rostyle wheels|
|I just bought a set of new Minator wheels to replace the rusty wires that were on the car. I fitted 175/70-R14 General tires. They perform extremely well and the 185s will probably fit with no problem, if my car is a good example. RAY|
|Thats reasurring then. Now I just need to decide if the Federal tyres that are fitted are actually any good (are they going to suprise me in the wet!). If I need to put new tyres on then the price the seller is asking is too high (UKP200) and I will get some new wheels and tyres from MGBHive. However I do believe that they are the KN Minators. The Minator copies I have on my Midget are pretty good though.|
Does anyone know where the date code is on tyres and how it is coded?
|If they were made after 2000 most -not all- have a 4 digit code. Stamped on the sidewall clockwise round from the size, after the DOT box. First 2 digits are the week, second 2 are the year. So 2806 is 28th week of 2006. Federal sound like a Budget brand. As for age look for small cracks around the perimeter edge -tyres perish!- and does the rubber have a shiny sheen to it. If so -it's old. If someone has put tyre dressing on it I wouldn't touch it- as its probably covering up its age!!!|
|Also, look in the tread itself. Small cracks will appear between the the raised treads levels showing age related problems, even if the sidewalls are still in good condition. RAY|
|I spoke to the seller last night. Tyres are date coded 2009 so about 15 months old. I read mixed comments on Federal tyres but the majority are reasonably favourable for a budget tyre. I just need to be aware of possible clearance issues. Would rim size have an affect on this? I believe them to be 5 1/2 inch rims. How is this marked on a Minator?|
|The 14" Minator wheels, for the MGB, are 5.5" wide. I have no clearance issues with mine. I probably could have easily gone with 185 tires, but I played it safe and stuck with the 175 tires that I had on the car before fitting the new wheels. RAY|
|I have 185/65 tyres on 14" x 5.5" Minator knock-ons on a 1970 GT with no clearance problems.|
This thread was discussed between 11/08/2010 and 15/08/2010
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