This may or may not help with the REAR Wheel/Tire Combos
REAR WHEEL WELLS
Every car is different from Driver Side to Passenger Side
and taking measurements of your car's Rear Wheel Wells etc
is the key to what Wheel / Tire Combo size will fit without rubbing or hitting anything ;
BACK SPACING & WHEEL WELL / Shock Mount Room https://www.rsracing.com/tech-wheel.html
First measure with the current sized Wheels/Tires on the Car ;
1.Wheel’s Rim room inside curved lip of Wheel Rim to bottom part of Shock Nut =
This is because as you increase the Back Space on a Wheel
and or increase the Width of the Wheel it may interfere with the Lower Shock Mount/Bolt
2.SPACE from Front of Fender Well to front of current tire when mounted to rear end this is for to measure the MAX height/diameter a tire can be
as it is Important that you allow Bias tires a growth margin .
Second with the Wheels/Tires removed from Both DR & Pass sides, one side at a time or all same time
measure the following;
A. Rear End Width – Face of Rear Brake Drum/Disc Driverside to Face of Drum/Disc Passengerside = ??“
B.OUT SPACE from inside Lip of outside Fender to Face of Rear Drum/Disc Brake Hub/Wheel Mounting Pad
................. DR Side = ??“ .... PASS Side = ??”
C.IN SPACE from Face of Rear Brake Drum/Disc Hub/Wheel Mounting Pad to Frame/Inner Fender
................. DR Side = ??“ .... PASS Side = ??”
D.Total Wheel Well Space = # 2 + # 3 measurements #s
................. DR Side = ??“ .... PASS Side = ??”
if one side is less then use it as the applicable number
or make sure the Rearend is centered properly
Important things to NOTE;
1. the Rear Lower Shock Mount Bolt may interfere with the Wheel’s Rim
2. and yes your car's exhaust may interfere with the Tire on a 10" Wide Wheel
3. Type of Brake system on rearend, Drum or Disc ! as the Disc setup is usually wider than a Drum setup
4. Is Rearend centred ?
5. Has the car been Lowered ?
6. Side Wall/Section Width of the Tire = ?
7. Diameter Height of Tire = ? Note to make sure a to High of a Diameter Tire is not used ;
Measure from the Centre of the Wheel towards the Front of the Car to the Body behind the Door
to see how much Space there is = ?? X 2 = for the Max Diameter Tire to use LESS a little ! EG. 14.5” x 2 = 29” Max = 28”
8. Size of Wheel you wish run ?
Measure twice and you will only need to buy once the Wheels/Tires Combo
you want to fit within your car’s Wheel Wells .
Here is an Example ;
My 67 Chevelle with a 60” Wide Rearend
Car's Wheel Well Measured Total Wheel Well Space = 13"
This is based on the following;
B. Measuring from the Face of the Drum Brake on a 60" Wide Rearend OUTward to the Innerside of the Fenderside = 5.92" OUT Space
C. Measuring from the Face of the Drum Brake on a 60" Wide Rearend INward to the Frame = 7.08" IN Space
D. B.# + C# = 13” Total Wheel Well Space
E. Just to Double Check, Measure from the Fender Inner lip to the Frame/Inner Fender = 13"
So here is the cal for my Car's Wheel Well to see what is the Best/Biggest Wheel / Tire Combo to Fit without any Rubbing etc. ;
Out Room from Fender Lip to outside Tire Side Wall and inside Tire Side Wall to Frame IN Room
Wheel 8“ Wide with a 4.5” Back Space
a. the portion of it towards the OUTside / Inner Fenderlip = 3.5" = 43.75%
b. the portion of it towards the INside/Frame = 4.5" = 56.25%
Tire Mickey Thompson ET Street S/S Radial Tire P275/60R15 = Dia 28.2"/ Tread Width 9.3"/ Side Wall Width 11.1"
Max OUTspace 5.92” 1.07” = Room To Tire Sidewall from FenderLip 4.85” outward TIRE inward 6.25” Room from Tire Sidewall to Frame = .83” Max INspace 7.08”
Wheel 10 “ Wide with a 5.5” Back Space
a. the portion of it towards the OUTside / Inner Fenderlip = 4.5" = 45%
b. the portion of it towards the INside/Frame = 5.5" = 55%
Tire Mickey Thompson ET Street S/S Radial Tire P295/55R15 = Dia 27.8"/ Tread Width 10.6"/ Side Wall Width 12.2"
Max OUTspace 5.92” .43” = Room To Tire Sidewall from FenderLip 5.49” outward TIRE inward 6.71” Room from Tire Sidewall to Frame = .37” Max INspace 7.08”
REAR WHEEL WELLS
Every car is different from Driver Side to Passenger Side
and taking measurements of your car's Rear Wheel Wells etc
is the key to what Wheel / Tire Combo size will fit without rubbing or hitting anything ;
BACK SPACING & WHEEL WELL / Shock Mount Room https://www.rsracing.com/tech-wheel.html
First measure with the current sized Wheels/Tires on the Car ;
1.Wheel’s Rim room inside curved lip of Wheel Rim to bottom part of Shock Nut =
This is because as you increase the Back Space on a Wheel
and or increase the Width of the Wheel it may interfere with the Lower Shock Mount/Bolt
2.SPACE from Front of Fender Well to front of current tire when mounted to rear end this is for to measure the MAX height/diameter a tire can be
as it is Important that you allow Bias tires a growth margin .
Second with the Wheels/Tires removed from Both DR & Pass sides, one side at a time or all same time
measure the following;
A. Rear End Width – Face of Rear Brake Drum/Disc Driverside to Face of Drum/Disc Passengerside = ??“
B.OUT SPACE from inside Lip of outside Fender to Face of Rear Drum/Disc Brake Hub/Wheel Mounting Pad
................. DR Side = ??“ .... PASS Side = ??”
C.IN SPACE from Face of Rear Brake Drum/Disc Hub/Wheel Mounting Pad to Frame/Inner Fender
................. DR Side = ??“ .... PASS Side = ??”
D.Total Wheel Well Space = # 2 + # 3 measurements #s
................. DR Side = ??“ .... PASS Side = ??”
if one side is less then use it as the applicable number
or make sure the Rearend is centered properly
Important things to NOTE;
1. the Rear Lower Shock Mount Bolt may interfere with the Wheel’s Rim
2. and yes your car's exhaust may interfere with the Tire on a 10" Wide Wheel
3. Type of Brake system on rearend, Drum or Disc ! as the Disc setup is usually wider than a Drum setup
4. Is Rearend centred ?
5. Has the car been Lowered ?
6. Side Wall/Section Width of the Tire = ?
7. Diameter Height of Tire = ? Note to make sure a to High of a Diameter Tire is not used ;
Measure from the Centre of the Wheel towards the Front of the Car to the Body behind the Door
to see how much Space there is = ?? X 2 = for the Max Diameter Tire to use LESS a little ! EG. 14.5” x 2 = 29” Max = 28”
8. Size of Wheel you wish run ?
Measure twice and you will only need to buy once the Wheels/Tires Combo
you want to fit within your car’s Wheel Wells .
Here is an Example ;
My 67 Chevelle with a 60” Wide Rearend
Car's Wheel Well Measured Total Wheel Well Space = 13"
This is based on the following;
B. Measuring from the Face of the Drum Brake on a 60" Wide Rearend OUTward to the Innerside of the Fenderside = 5.92" OUT Space
C. Measuring from the Face of the Drum Brake on a 60" Wide Rearend INward to the Frame = 7.08" IN Space
D. B.# + C# = 13” Total Wheel Well Space
E. Just to Double Check, Measure from the Fender Inner lip to the Frame/Inner Fender = 13"
So here is the cal for my Car's Wheel Well to see what is the Best/Biggest Wheel / Tire Combo to Fit without any Rubbing etc. ;
Out Room from Fender Lip to outside Tire Side Wall and inside Tire Side Wall to Frame IN Room
Wheel 8“ Wide with a 4.5” Back Space
a. the portion of it towards the OUTside / Inner Fenderlip = 3.5" = 43.75%
b. the portion of it towards the INside/Frame = 4.5" = 56.25%
Tire Mickey Thompson ET Street S/S Radial Tire P275/60R15 = Dia 28.2"/ Tread Width 9.3"/ Side Wall Width 11.1"
Max OUTspace 5.92” 1.07” = Room To Tire Sidewall from FenderLip 4.85” outward TIRE inward 6.25” Room from Tire Sidewall to Frame = .83” Max INspace 7.08”
Wheel 10 “ Wide with a 5.5” Back Space
a. the portion of it towards the OUTside / Inner Fenderlip = 4.5" = 45%
b. the portion of it towards the INside/Frame = 5.5" = 55%
Tire Mickey Thompson ET Street S/S Radial Tire P295/55R15 = Dia 27.8"/ Tread Width 10.6"/ Side Wall Width 12.2"
Max OUTspace 5.92” .43” = Room To Tire Sidewall from FenderLip 5.49” outward TIRE inward 6.71” Room from Tire Sidewall to Frame = .37” Max INspace 7.08”