Categories › Software Development › Hardware, IoT, embedded & 3D printing
Bolt patterns and wheel specs by vehicle, wheel and tire fitment, spacer and gear ratio maths.
Remote server: your requests and data go to checkfitment.com. Claude Code: claude mcp add --transport http checkfitment https://checkfitment.com/mcp?src=mcp · Claude app: Settings → Connectors → Add custom connector.
The tools this server listed when we connected to it, in its own words.
bolt_pattern_lookup — Use for "what is the bolt pattern on a 2019 Ford F-150", lug torque, center bore, thread size, OEM wheel size, offset or tire size of a vehiwheel_fitment_check — Use to compare a current wheel (and tire) with a new one: how far the outer edge pokes toward the fender and the inner edge toward the suspetire_size_compare — Use for "what changes if I go from 265/70R17 to 285/75R17", "how far off is my speedometer with 33s", or odometer error after a tire change.wheel_spacer_calculator — Use for "do I need spacers", "what spacer gets +35 wheels to +20", "is a 10 mm slip-on spacer safe". A spacer lowers the effective offset bygear_ratio_calculator — Use for "what does my 3.73 axle behave like on 35s", "what ratio do I need to regear for 33s", RPM at highway speed after a tire change, or bolt_pattern_facts — Use for "what is 5x114.3 in inches", "is 5x114.3 the same as 5x115", "will 6x135 wheels fit 6x139.7", or which vehicles use a pattern. ConveNot tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.