Ridley Grifn Tire Clearance: Drivetrain and Mudguard Limits Compared
Ridley Grifn tire clearance changes with the drivetrain and with mudguards. The Grifn model FAQ gives 40 mm with a single-chainring drivetrain, 38 mm with a double, and 32 mm with fenders. A separate Grifn A FAQ agrees on 40 and 38 mm but gives 34 mm with mudguards. Those last figures belong to different named models, rather than one universal Grifn limit.
Ridley Grifn tire clearance by drivetrain
The Grifn FAQ explicitly says the listed width is the tire’s actual width on the rim. Keep that measurement basis beside the 40 and 38 mm figures. A sidewall label alone does not establish that the installed tire matches the actual-width condition in the source.
Write down whether the bicycle has one or two front chainrings before comparing its intended tire. The manufacturer’s conditions are not an instruction to choose whichever of the two limits is larger. A different drivetrain arrangement needs the corresponding entry.
Why 32 mm and 34 mm should remain model-specific
The Grifn source gives 32 mm with fenders. The separate Grifn A page gives 34 mm with mudguards. The reviewed pages identify different model sections; they do not explain the difference as a corrected value or an update applying retrospectively to every Grifn.
For an actual guarded setup, identify the exact model and refer to its own entry. If other documentation for that same bicycle disagrees, ask for clarification rather than borrowing the allowance from the other model. The Grifn A FAQ does not explicitly repeat the Grifn page’s actual-width sentence.
A mudguard mounting point does not settle tire space
The Grifn A mudguard FAQ confirms that mounting points are provided and names the specific set MDGM50CUR003. That identifies an accessory reference, not a replacement for the separate tire-clearance guidance. The number within the product code should not be reinterpreted as an approved tire width.
Confirm the actual guard and wheel arrangement as well as the bicycle identity when discussing an installation. No test of a particular tire is reported here. The older X-Bow photograph cannot verify either Grifn’s mudguard space, because it depicts a different historical model. The Ridley introduction places Grifn among the other models in the brand range.
FAQ
Does the Grifn source use the tire’s printed size as its basis?
No. It explicitly refers to actual tire width on the rim.
Does the Grifn A mudguard figure replace the Grifn’s 32 mm entry?
No. The reviewed pages belong to separate named model sections.
Does the mudguard-set code prove a 50 mm tire fits?
No. An accessory code is not a stated tire-clearance approval.
Sources
Manufacturer records for Ridley Grifn tire clearance: Manufacturer support directory and model grouping (https://www.ridley-bikes.com/en_US/support/folders/63000157885). Grifn tire-clearance FAQ (https://www.ridley-bikes.com/en_US/support/folders/63000157885/article/63000275857). Grifn A tire-clearance FAQ (https://www.ridley-bikes.com/en_US/support/folders/63000157885/article/63000282957). Grifn A mudguard FAQ (https://www.ridley-bikes.com/en_US/support/folders/63000157885/article/63000282950). Retrieved 28 October 2026. The historical photograph is credited separately above and below.
Photograph credits and permissions
Photograph 1
Original title: Ridley.jpg
Creator: Pinguinsen
Original source URI: https://commons.wikimedia.org/wiki/File:Ridley.jpg
License / permission: CC BY-SA 4.0
License / permission URI: https://creativecommons.org/licenses/by-sa/4.0/
Modification notice: Original 800×600 JPEG used without cropping, retouching or re-encoding by this publisher. Photograph remains under CC BY-SA 4.0.