bots.st/checkfitment
CheckFitment
Vehicle wheel and tire fitment math
2177 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 6
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://checkfitment.com/mcp?src=mcp
What it can do
| Tool | What it says it does |
|---|---|
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. Converts mm and inch notation, lists look-alike patterns that do not interchange, the vehicles in the dataset with that pattern, the lug tightening order and… |
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 vehicle, or "will these wheels fit my car" when the vehicle is named. Looks the vehicle up in the CheckFitment dataset (a fixed set of vehicles, each spec cited… |
gear_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 the crawl ratio (with transfer-case low ratio and first gear). Returns the effective ratio, RPM before and after in a 1:1 gear, the ratio that restores stock… |
tire_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. Returns diameter, width, sidewall and ride-height change, the true speed when the speedometer shows a given value, the odometer error and how serious it is… |
wheel_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 suspension, the diameter and ride-height change, speedometer effect, backspacing, and whether the new tire width suits the new rim width. With measured clearances… |
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 by its thickness. Returns the spacer needed for a target offset (and the nearest common size), the effective offset, track change, whether it is slip-on or… |
In its maker's words
Bolt patterns and wheel specs by vehicle, wheel and tire fitment, spacer and gear ratio maths.
- Website
- checkfitment.com/ai-assistants
- Publisher
- checkfitment.com
- Listed from
- the official MCP Registry as
com.checkfitment/checkfitment - Version
- 1.1.0, updated 24 Oct 2026
- Kinds of work
- Other work, Health and science, Data and databases
The domain it lives on
- checkfitment.com
- registered 15 Sep 2026 (2 months ago), at Cloudflare, Inc.
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 2177 ms | |
| Answered | 2473 ms | |
| Answered | 213 ms |
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