28mm vs 30mm vs 32mm Tires — The Hard Truth Nobody Talks About

Tire Width and Speed

The video argues that 28, 30, or 32 mm tire width does not, by itself, determine speed. The best choice depends on tire pressure, rider-and-bike weight, road surface, rim width, and frame clearance.

Testing and the role of pressure

The video opens with a 2019 test of four Continental Grand Prix 5000 sizes—23, 25, 28, and 32 mm—on a steel drum at 29 km/h under a 42.5 kg load. At the same 80 psi, the 28 mm tire used 9.2 watts and the 32 mm tire used 9.0 watts, suggesting a small advantage for the wider tire. But when pressure was adjusted so that each tire compressed by the same amount, the results clustered between 11.3 and 11.5 watts.

The video’s central point is that much of the apparent advantage comes from pressure and comfort settings, not width alone.

The narrator traces cycling’s shift from narrow, highly inflated tires to wider ones. Older drum tests and racing convention favored narrow tires, while real-road testing associated with Jan Heine highlighted “suspension losses”: on rough surfaces, a stiff tire can transmit vibration into the rider, wasting energy. The video notes that Heine’s company sells wide tires, while also saying that other testing has supported the broader findings.

A 2022 test of Continental Grand Prix 5000 STR tires at recommended pressures found:

• 28 mm: 10.2 watts
• 30 mm: 10.0 watts
• 32 mm: 9.8 watts

The 0.4-watt-per-tire difference between 28 and 32 mm is described as tiny in ordinary riding. Wider tires generally offer more comfort and somewhat better grip, but add weight and may increase aerodynamic drag.

Comparing tire widths

• 28 mm: May suit lighter riders, smooth roads, narrow older rims, or frames with limited clearance. It may be less comfortable on rough roads and may not meet recommendations for some modern wide rims.
• 30 mm: A middle-ground option for mixed roads and riders seeking both comfort and efficient group riding. The narrator favors it, but stresses that it is not universally best.
• 32 mm: Offers more air volume and comfort, and can be advantageous on rough roads, cobbles, or for heavier riders. It may not fit older frames and can bring aerodynamic costs at high speeds, depending on the rim and setup.

The actual inflated width can differ from the sidewall label, particularly on wider rims. The video advises measuring the tire on the wheel you intend to use rather than comparing labels alone.

Other factors to consider

Aerodynamic drag rises with speed, so the video says tire-width differences matter more to fast racers than to many recreational riders. Weight differences are modest: one test found the 32 mm version 44 g heavier per tire than the 28 mm version. Clearance, however, can be critical. The narrator recommends checking that an installed tire has at least a few millimeters of space around it.

Equipment standards also affect tire choice. The video cites updated ETRTO recommendations calling for a tire around 5 mm wider than a rim’s internal width, and reports a 72.5 psi maximum for hookless road rims. These standards can make wider tires necessary for some modern wheel setups. The narrator also notes that wider rims, tires, and frames have become part of a broader cycle of equipment upgrades.

Professional racing examples

Professional racing examples reinforce that there is no single ideal width. Mathieu van der Poel reportedly used 32 mm tires in his 2023, 2024, and 2025 Paris–Roubaix wins, while some riders and teams chose narrower options. Very wide tires may be valuable on cobbles, whereas narrower tires are used for faster paved events and time trials, where aerodynamics matter more.

Recommendation

The closing recommendation is to choose the narrowest tire that provides the comfort and puncture protection needed for your roads, then set pressure appropriately. Consider rider-and-bike weight, road conditions, internal rim width, and actual frame clearance before buying. Measuring existing tires, checking fit, and adjusting pressure in small steps may make more difference than changing tire width.

Presenter and Sources Cited

Presenter: Unnamed narrator for CycleWorth.

Sources and people cited in the subtitles: Jarno Bierman (also rendered with spelling variations in the subtitles); Jan Heine and Bicycle Quarterly; BikeRadar, including Simon von Bromley, Ashley Quinlan, and Simon van Velthoven; Tour magazine, including Jens Klärtser; Cycling Weekly; Cyclingnews / Cycling News; Road Bike Action; Slowtwitch; Ride Media; the 1920s French publication L’Cycliste and editor Velocio; the US Army tank-seat vibration study; Josh Poertner and Silca; Swiss Side; Continental; ETRTO; Chris King; Hunt Bike Wheels; Rene Herse Cycles; and professional riders and teams quoted in connection with Paris–Roubaix and Tour de France tire choices.