Bonneville T120 tires
The OE tire sizes for the Triumph Bonneville T120 (current as of Aug 2026) are 100/90-18 front / 150/70R17 rear. Below are tires in these sizes, compared across brands. OE rim widths are F2.75 / R4.25 (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 (10 models)
Front + rear set: 10 models can cover both ends (matching sizes in bold, based on F=100/90-18 / R=150/70R17). Shop links search on the model name alone.
The default bias tire for the 250 class. Dunlop credits “grip and long life from the latest compound.” A broad size range that covers most 17- to 19-inch naked bikes.
Sizes: F 100/90-16, 120/80-16, 70/90-17, 100/80-17, 110/70-17, 110/80-17, 120/70-17, 90/90-18, 100/80-18, 100/90-18, 110/90-18, 100/90-19 / R 130/90-16, 80/90-17, 120/80-17, 130/70-17, 130/90-17, 140/70-17, 150/70-17, 110/80-18, 110/90-18, 120/80-18, 120/90-18, 130/70-18, 130/80-18, 140/70-18, 150/70-18
Where to buy
Sport touring on a bias construction. One of very few current tires offered in both 100/90-19 and 130/70-18, which lets you set up a GB350 front and rear on the sporting side.
Sizes: F 110/90-16, 120/80-16, 110/70-17, 110/80-17, 120/70-17, 100/90-18, 110/80-18, 110/90-18, 100/90-19 / R 130/90-16, 150/80-16, 130/70-17, 130/80-17, 130/90-17, 140/70-17, 150/70-17, 120/90-18, 130/70-18, 130/80-18, 140/70-18
Where to buy
The touring bias standard. Bridgestone’s line is “wet performance you can lean on — the definitive touring bias, further developed.” First choice if you ride in the rain.
Sizes: F 100/90-16, 110/90-16, 120/80-16, 100/80-17, 110/70-17, 110/80-17, 120/70-17, 90/90-18, 100/80-18, 100/90-18, 110/80-18, 110/90-18, 3.25-19, 100/90-19, 90/90-21 / R 130/90-16, 150/80-16, 120/80-17, 120/90-17, 130/70-17, 130/80-17, 130/90-17, 140/70-17, 140/80-17, 150/70-17, 4.00-18, 110/80-18, 110/90-18, 120/80-18, 120/90-18, 130/70-18, 130/80-18, 140/70-18, 150/70-18
Where to buy
A touring tire. Metzeler’s English copy is “ride longer, ride further, ride safer.” It reaches from bias 110/70-17 and 140/70-17 all the way to cruiser sizes (130/90-16, 150/80-16). There is no Japanese page for it; confirmed on the English site.
Sizes: F 100/90-16, 110/90-16, 130/90-16, 100/80-17, 110/70-17, 110/80-17, 120/60ZR17, 120/70ZR17, 80/100-18, 100/90-18, 3.25-19, 90/90-19, 100/90-19 / R 130/90-16, 150/80-16, 130/70-17, 130/80-17, 140/70-17, 140/80-17, 150/70-17, 160/70ZR17, 180/55ZR17, 190/50ZR17, 190/55ZR17, 90/90-18, 110/90-18, 120/80-18, 4.00-18
Where to buy
Michelin calls it “the new tire for classic bikes, with safety improved further.” It has both 100/90B19 and 130/70B18, so it updates a GB350 or GB350C front and rear without changing the classic look. Tubeless in every size (Michelin notes it can also go on a WT rim with a tube fitted).
Sizes: F 100/80B17, 110/70B17, 110/80B17, 90/90B18, 100/90-18, 110/80B18, 110/90B18, 100/90B19, 3.25B19 / R 130/70B17, 130/80B17, 130/90B17, 140/80B17, 150/70B17, 150/70R17, 120/90B18, 130/70B18, 130/80B18, 4.00B18
Where to buy
Dunlop describes an “all-round touring radial covering town riding through to winding roads.” A default for 250–400 radial-shod bikes, and the 120/60ZR17 makes it fit the CB400SF. Dunlop notes explicitly that the rear must not be fitted to rims outside the approved width.
Sizes: F 110/70R17, 120/60R17, 130/70ZR16, 110/70ZR17, 120/60ZR17, 120/70ZR17, 110/80ZR18 / R 140/70R17, 150/60R17, 160/60R17, 140/60R18, 150/60R18, 150/70ZR17, 160/60ZR17, 170/60ZR17, 180/55ZR17, 190/50ZR17
Where to buy
A standard bias tire in 17 and 18 inch. Dunlop marks the 140/80-17 and 150/70-18 as while-stocks-last.
Sizes: F 110/80-17, 110/70-17, 120/70-17, 110/80-18, 120/70-18 / R 140/80-17, 140/70-17, 150/70-17, 160/70-17, 150/70-18
Where to buy
Bridgestone’s line is “long life that makes itself heard.” A touring radial. One of very few current road tires available in 110/80R19, which covers both ends of the CL250, and it also has 120/60ZR17 (CB400SF) and 150/70ZR17 (GB350S rear).
Sizes: F 120/60ZR17, 120/70ZR17, 120/70ZR18, 110/80R19, 120/70R19, 110/80ZR18, 120/70ZR19 / R 150/70ZR17, 160/60ZR17, 170/60ZR17, 180/55ZR17, 190/50ZR17, 190/55ZR17, 160/70ZR17, 160/60ZR18
Where to buy
Bridgestone aims it at “on-road-centred adventure touring.” Strong on 19-inch fronts — 110/80R19, 120/70R19, 100/90-19 — so it fits the front of the CL250, CL500 and 400X. Rears go up to 150/70R17 (CL family) and 160/60ZR17 (400X).
Sizes: F 120/70R15, 120/70ZR17, 110/80R18, 100/90-19, 110/80R19, 120/70R19, 120/70ZR19, 90/90-21, 90/90V21 / R 130/80R17, 140/80R17, 150/70R17, 160/60ZR17, 170/60R17, 170/60ZR17, 180/55ZR17, 190/55R17, 190/55ZR17, 150/70R18, 150/70ZR18
Where to buy
Dunlop describes “the traditional TT100GP pattern, optimised with current technology for the latest neo-classics running radials.” A different tire from the bias TT100GP, aimed at radial-shod machines such as the Z900RS and the XSR family.
Sizes: F 120/70ZR17, 110/80R18 / R 150/70ZR17, 160/60ZR17, 180/55ZR17, 140/70R18
Where to buy
Front 100/90-18 options (20 total, 10 of them listed in the set section above)
Size 100/90-18: 8 exact, 12 in the same group. Shop links carry each tire’s own matching size.
IRC describes the pattern as one that “suits classic and vintage machines,” with a sport compound giving “both wet performance and a solid feel.” IRC’s own fitment chart lists it front and rear for the W230.
Sizes: F 90/90-18, 90/100-18, 100/90-18, 100/90-19 / R 110/90-17, 130/80-17, 110/90-18, 130/70-18, 130/80-18
Where to buy
Dunlop describes “the traditional TT100 pattern, with modern technology poured in without restraint.” The obvious fit for classics like the W230. TL and WT split by size, so check before you buy.
Sizes: F 3.50-8, 110/90-17, 120/80-17, 3.00-18, 3.50-18, 4.00-18, 80/90-18, 90/90-18, 90/100-18, 110/90-18, 100/90-19, 100/90-18 / R 3.50-8, 110/90-17, 120/80-17, 3.00-18, 3.50-18, 4.00-18, 80/90-18, 90/90-18, 90/100-18, 110/90-18, 100/90-19, 130/80-18
Where to buy
A bias tire for older and neo-classic machines. It runs 16 to 19 inch, landing on W800, GB350 and Rebel sizes. The 100/90-18 and 130/80-18 also come in an H speed rating (the fitment for the Kawasaki W800 Street/Cafe, ’19 on).
Sizes: F 120/80-16, 100/90-18, 110/90-18, 100/90-19 / R 130/90-16, 150/80-16, 130/90-17, 120/90-18, 130/80-18
Where to buy
Bridgestone’s line is “a tire built to win 1980s superbike races.” Direct from Racing Battlax, with high dry grip alongside warm-up speed and wet performance. An unusual size set — 110/80R18 front, 150/65R18 rear, 18 inch only — aimed at classic racing. There is no not-for-road marking.
Sizes: F 110/80R18 / R 150/65R18
Where to buy
Bridgestone’s line is “a sport radial that sharpens up the feet of an ’80s custom.” ★ All that remains is one 18-inch pairing, 110/80ZR18 front and 150/70ZR18 rear ★ Not aimed at current supersports so much as at custom builds on older bikes.
Sizes: F 110/80ZR18 / R 150/70ZR18
Where to buy
Dunlop’s line is “performance that lasts — the new standard premium touring radial.” Mostly aimed at large tourers, but the 120/60ZR17 and 160/60ZR17 make it a touring-leaning option for the CB400SF.
Sizes: F 120/60ZR17, 120/70ZR17, 130/70ZR17, 110/80R18, 120/70ZR18 / R 160/60ZR17, 160/70ZR17, 170/60ZR17, 180/55ZR17, 190/50ZR17, 190/55ZR17, 190/60ZR17, 140/70R18, 150/70ZR18, 170/60ZR18
Where to buy
Bridgestone calls it “a touring bias with a long sales record, built on all-round performance matched to what riders actually need.” Silica in the compound for wet performance, and a sport-sact rear. ★ The Japanese lineup has shrunk to two front and three rear sizes; almost none of the small diameters that made it a staple are left ★
Sizes: F 3.50-18, 90/100-18 / R 4.00-18, 110/90-18, 150/70-18
Where to buy
Bridgestone files it as an “on-road high-performance type” bias tire. The sizes land on the 17-inch ends of 250–400 naked bikes. As Bridgestone’s own note says — “this is a rare size and delivery may take time” — availability is not good.
Sizes: F 110/70-17, 120/70-17, 110/80-18 / R 140/70-17
Where to buy
Bridgestone speeds up water flow through “pulse grooves, patterned as if beating,” for better wet performance. A touring radial. ★ Only the 18-inch sizes are still listed (110/80R18 front, 140/70R18 rear) ★ The main 17-inch sizes have moved to the T33.
Sizes: F 110/80R18 / R 140/70R18
Where to buy
The British-born bias tire the TT100GP grew out of, for older machines. Inch sizes only, and the same sizes work front or rear. ★ Because the size range is identical at both ends, we list every size as both front and rear ★
Sizes: F 3.60-18, 4.10-18, 4.25/85-18, 3.60-19 / R 3.60-18, 4.10-18, 4.25/85-18, 3.60-19
Where to buy
Rear 150/70R17 options (16 total, 10 of them listed in the set section above)
Size 150/70-17: 16 exact, 0 in the same group. Shop links carry each tire’s own matching size.
Dunlop cites “strong dry grip and aggressive handling.” The name that defines the high-grip bias tire, and it comes in MT-25 / Z250 sizes (110/70-17, 140/70-17).
Sizes: F 100/80-14, 80/90-16, 90/90-16, 100/90-16, 100/80-17, 110/80-17, 110/70-17 / R 120/80-14, 90/90-17, 90/80-17, 100/80-17, 120/80-17, 130/70-17, 140/70-17, 150/70-17, 90/90-18, 100/90-18, 120/80-18, 140/70-18, 150/70-18
Where to buy
IRC calls it “a modern road-going bias tire tuned for the quarter-litre class.” Unlike the RX-01 every size is tubeless, and it covers the MT-25 / Z250 sizes (110/70-17, 140/70-17).
Sizes: F 100/80-17, 110/70-17, 110/80-17, 120/70-17 / R 120/80-17, 130/70-17, 130/80-17, 140/70-17, 150/70-17, 140/70-18, 150/70-18
Where to buy
Bridgestone files it as “mainly ON,” and both ends are OE fitments. Despite the Trail Wing name there is no knobby pattern; it is an adventure-styled road tire. ★ The 160/60R15 rear makes it one of the very few options for the X-ADV ★ Bridgestone notes that “this is a rare size and delivery may take time.”
Sizes: F 120/70R17, 110/80R19 / R 160/60R15, 130/80R17, 150/70R17
Where to buy
The mainstay sport tourer, sold on its wet performance. It reaches into 18 and 19 inch, which is a wide net. The catalogue lists it in both the Sport Touring and Trail sections.
Sizes: F 110/70ZR17, 120/60ZR17, 120/70ZR17, 120/70ZR18, 110/80ZR19, 120/70ZR19 / R 140/70ZR17, 150/60ZR17, 150/70ZR17, 160/60ZR17, 170/60ZR17, 180/55ZR17, 190/50ZR17, 190/55ZR17
Where to buy
The Road 6’s predecessor, still in the 2026 catalogue alongside it.
Sizes: F 120/60ZR17, 120/70ZR17 / R 150/70ZR17, 160/60ZR17, 180/55ZR17, 190/50ZR17, 190/55ZR17
Where to buy
A radial from the Harley OE Scorcher family. Custom sizes run deep here — 140/75R17, 240/40R18, 130/60B21 among them.
Sizes: F 100/80-17, 140/75R17, 120/70ZR18, 160/60R18, 120/70ZR19, 130/60B21 / R 140/75R15, 150/60ZR17, 150/70ZR17, 180/55ZR17, 200/55R17, 240/40R18
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.