Finally, don't hesitate to contact us if you need any support. Then place the top bar of the tool onto the top and tighten the nut to compress the whole assembly enough so you can attach the bolts to secure the wheel together - makes the process much easier and is a huge time saverBars measure 9 inches in length making this tool suitable for wheelchair casters, and scooter and wheelchair rims up to 8 inchesThreaded shaft measure 5/8" in diameter to fit a majority of wheelchair caster and drive wheel rims as well as scooter rims (tool works without bearings in place)Can be mounted in a bench vise for a more secure holdMade from heavy gauge steel for durability Important note, please read before purchase:Some wheelchair drive wheels are attached to a hub instead of an axle meaning there is no hole in the middle for the threaded shaft of this tool to go through. If you have such a wheelchair wheel, this tool will not work. QUICKY Quick & Easy Tire Mounting Tool (optional tool) | Team Ottsix Racing You may need to put the tires on hot water for a few minutes prior to installation to soften the tire a bit and to stretch them easier. Tool Box, Tire Rack and Welder Combo - BUCK BUILDS Solid tires are usually about 2-3 smaller than the rims and the reason is that there has to be some compression while mounted on the rim, otherwise the tires would easily roll off the rims. Tire Wheel Tools What Is Economy Tire Order Always be very careful during installation. Also be very careful when using screwdrivers as second tool as they can become lethal projectiles and can also scratch/mark your wheels. Even with this tire tool, tires will seem to be small and will need to be stretch a bit in order to fit the rims properly. Economy Tire Installation Tool - Box of 1 Add to cart Overall Pick Tire Iron Spoons Changing Tire Lever Bar Set Repair Tool Kit Tyre Changer Remover Heavy Duty Metal Steel for Motorcycle Bike Scooter Bicycle Mower (2pc 11.7 INCH) 700+ bought in past month Add to cart Bicycle Tire Levers - Ultra Strong Tire Removal Tool for Road or Mountain Bike... Let the tool do the hard work.