Garden Tractor Lawnmower Tube 3.50/4.00-8" Straight Valve Straight Valve

Garden Tractor Lawnmower Tube Tube

Suitable for Garden Tractors, Ride-on Lawnmowers & Golf Buggys

Additional Information: Garden Tractor Lawnmower 3.50/4.00-8" Straight Valve

Helpful Guide to better understand sizes:

eg 3.00-4,  3.50-6,  4.00-8,  5.20-10,  6.00-12
This is the most simple size marking. The first part, 3.00, is simply both the width of the tyre and the height of the sidewall of the tyre in inches. The second part, -4, is the rim diameter in inches. So a 3.00-4 tyre would fit a 4" diameter rim, be 3" wide and 3" tall on the sidewall. Therefore, the overall height of the tyre would be 10" (4" plus 3" plus 3").

eg 6-12,  7-14,  8-16,  9.5-18 
Similar to above, but this method does away with the '.00' bit for the first part of the size. Again, all dimensions are in inches. It is worth mentioning that tyres with very similar markings may not be compatible - a 6-12 tyre will be significantly different in size to a 6.00-12. Whilst this may not be important if the application is say a two wheeled rotavator tyre, there can be more serious consequences if you change the tyre size on a four wheel drive tractor which will affect the gear ratios. If in doubt, stick to the exact size that is fitted to the vehicle or recommended by the manufacturer.

eg 4.10/3.50-4,  4.10/3.50-6,  5.30/4.50-6 
This time there are three parts to the tyre size, all in inches. The first, 4.10, is the approximate width of the tyre when fitted to the recommended wheel. The second, 3.50, is the height of the sidewall, and the third is the rim diameter.

So a 4.10/3.50-4 tyre is 4.1" wide, 3.5" tall on the sidewall and fits a 4" rim. This tyre would therefore have the appearance of a low profile tyre. ie it is lower than it is wide.

eg 11x4.00-4,  13x5.00-6,  18x8.50-8,  25x12.00-9 
This method is widely used on turf and ATV tyres and is probably the easiest to understand. The first part is the overall height (from the ground to the top of the tyre) of the tyre in inches, the second part is the width of the tyre in inches, and the third part is the rim diameter in inches.

If you are looking to change your tyre size, the height and width may be selected according to your needs, bu the last figure, the rim diameter, must be the same, unless you are buying new wheels too!

So a 25x12.00-9 ATV tyre would be 25" tall, 12" wide and fitted to a 9" rim.