KLX230 SHERPA S tires
The OE tire sizes for the Kawasaki KLX230 SHERPA S (2025–present) are 2.75-21 front / 4.10-18 rear. Below are tires in these sizes, compared across brands. OE rim widths are F1.60 / R2.15 (from official specs; used for the rim-width check). OE sizes can differ by model year and market — the sidewall of your own bike is the sure reference. This is a Japanese-market lineup; the sizes themselves are international.
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Tires that cover front and rear (13 models)
Front + rear set: 13 models can cover both ends (matching sizes in bold, based on F=2.75-21 / R=4.10-18). Shop links search on the model name alone. “Narrower” means one or two steps below the OE size. “Rim width OK” means the tire maker’s published rim widths line up with the OE rim width. No badge means we could not confirm it; combinations we found to be wrong are left out entirely.
GP-21 front, GP-22 rear. IRC calls it an all-rounder “covering the range of surfaces you expect on a forest-road tour.”
Sizes: F 110/80-17, 70/100-19, 2.75-21, 3.00-21, 80/100-21 / R 120/90-16, 90/100-16, 130/80-17, 140/70-17, 4.60-17, 120/80-18, 4.10-18
Where to buy
Successor to the TR-8 that came as OE on the European-spec XR250. IRC positions it as an on/off tire “weighted toward off-road ability,” aimed at riders who actually want to clear a trail.
Sizes: F 80/100-19, 2.75-21, 3.00-21, 80/100-21 / R 120/90-16, 120/80-18, 4.10-18, 4.60-18
Where to buy
IRC puts asphalt first here: “grip and water dispersal built around riding on pavement.” For keeping the dirt-bike look while riding mostly on the road.
Sizes: F 100/90-19, 80/100-19, 2.75-21, 3.00-21, 80/100-21 / R 120/90-16, 130/80-17, 120/80-18, 4.10-18, 4.60-18
Where to buy
IRC calls it a “well-balanced all-rounder.”
Sizes: F 2.75-21 / R 3.00-17, 3.00-18, 4.10-18
Where to buy
Dunlop calls it “strong grip off-road, ideal for forest-road touring” — the dirt-leaning trail tire.
Sizes: F 2.75-21, 3.00-21 / R 4.60-17, 120/80-18, 120/90-18, 4.10-18, 4.60-18, 100/90-19
Where to buy
Dunlop calls it an “all-round trail tire, stable from dirt through pavement.” A tubeless version for the Serow exists.
Sizes: F 70/100-19, 2.75-21, 3.00-21 / R 90/100-16, 4.60-17, 120/80-18, 4.10-18, 4.60-18
Where to buy
The road-leaning trail tire; Dunlop cites “stability on pavement and wear resistance.”
Sizes: F 110/80-14, 80/90-17, 2.75-21, 3.00-21 / R 130/70-13, 80/90-17, 120/80-18, 4.10-18, 4.60-18
Where to buy
Bridgestone’s “city off-roader’s standby” — all-round ability and long life. Comes in the WR250R’s OE size. ★ Only one size, 3.00-21, is still listed, and it is marked while-stocks-last — availability is the problem here ★
Sizes: F 2.75-21, 3.00-21, 80/100-21 / R 110/80-18, 120/80-18, 4.10-18, 4.60-18
Where to buy
Continental’s long-standing “rides the street, rides the dirt” tire, at a 50:50 split. Its official PDF states it is OE on the KTM 690 Enduro R, the Husqvarna 701 Enduro and the Triumph TF 450-E. The big knobs bite hard in dirt and wear accordingly. Unusually for the class it goes down to 21-inch tube sizes (2.50-21 to 3.00-21). From 2026 the second-generation TKC 80² is sold alongside it, so check which one you are buying.
Sizes: F 120/70-17, 100/90-19, 110/80B19, 120/70-19, 2.50-21, 2.75-21, 80/90-21, 3.00-21, 90/90-21 / R 120/90-17, 130/80-17, 5.10-17, 140/80-17, 150/70B17, 170/60B17, 180/55B17, 3.25-18, 3.50-18, 4.00-18, 4.10-18, 110/80-18, 120/90-18, 140/80-18, 150/70B18
Where to buy
Bridgestone describes “an off-road-leaning adventure tire refined for rough-road ability and durability.” 24 sizes in all, which is a wide net. Street legal.
Sizes: F 100/90-18, 100/90-19, 110/80B19, 120/70B19, 90/100-19, 2.75-21, 3.00-21, 80/100-21, 90/90-21 / R 120/90-16, 120/90-17, 130/80-17, 130/80B17, 140/80B17, 150/70B17, 170/60B17, 4.60-17, 120/80-18, 120/90-18, 130/80-18, 150/70B18, 4.00-18, 4.10-18, 4.60-18
Where to buy
Pirelli describes an on/off knobby “for dunes, gravel and cross-country through to asphalt.” Street legal, and the standard answer for serious dirt on a road-legal tire.
Sizes: F 80/90-21, 90/90-21 / R 120/90-17, 130/90-17, 110/80-18, 120/80-18, 120/90-18, 140/80-18
Where to buy
Pirelli covers “daily use in town through to weekend adventure,” on and off pavement, across all displacements.
Sizes: F 110/80-18, 80/90-21, 90/90-21 / R 120/90-17, 110/80-18, 120/80-18, 140/80-18, 150/70R18
Where to buy
A knobby adventure tire, and the usual answer for taking a big ADV bike onto dirt.
Sizes: F 110/80R19, 120/70R19, 80/90-21, 90/90-21 / R 130/80-17, 140/80-17, 150/70R17, 170/60R17, 110/80-18, 120/80-18, 130/80-18, 140/80-18, 150/70R18
Where to buy
Front 2.75-21 options (16 total, 13 of them listed in the set section above)
Size 2.75-21: 13 exact, 3 in the same group. 6 with no size data on file are out of scope. Shop links carry each tire’s own matching size.
IRC describes it as a tire for “mainly paved riding, with flat dirt still on the menu.” For riders who are on the road most of the time and hit a forest road now and then.
Sizes: F 110/80-17, 2.75-21, 3.00-21, 80/100-21 / R 120/90-16, 120/80-18, 4.60-18
Where to buy
IRC states it is “a street-legal trials tire developed from the TR-011.” Very strong on wet rock, and it covers everything from trials play to forest roads. The default choice among Serow riders.
Sizes: F 2.75-21 / R 4.00-18
Where to buy
A street-legal tire on a trials pattern (Pirelli states road use is permitted). Not listed on Pirelli’s Japanese site; confirmed on the English one.
Sizes: F 2.75-21 / R 4.00-18
Where to buy
Rear 4.10-18 options (14 total, 13 of them listed in the set section above)
Size 4.10-18: 11 exact, 3 in the same group. 6 with no size data on file are out of scope. Shop links carry each tire’s own matching size.
Bridgestone calls it a “pattern purely for road use on off-road machines.” Slick-like tread with deep grooves, chasing long life and high-speed stability — it has given up on forest roads entirely. For commuting and town riding on a dirt bike.
Sizes: F 3.00-21 / R 4.10-18, 4.60-18, 120/80-18
Where to buy
How to read this
- The 1–5 ratings are our own estimates. Not manufacturer figures, not measurements.
- Within one model, character and street legality both change with the size and the spec. Confirm with the manufacturer or a dealer before you buy.
- Shop links go to search results rather than product pages. Other sizes and older models will be mixed in.
- “Narrower” means one or two steps below the OE size. The “rim width OK” badge means the tire maker's published rim widths line up with the OE rim width; no badge means unconfirmed.
- Competition tires may not be used on public roads.