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GP5000 S TR tire pressure by width and rim

Continental's limits, and starting pressures by weight.

By Pedal BriefPublished 12 November 20265 min read

At a glance

Short answer: For 80 kg of rider plus bike on 28mm GP5000 S TR tubeless tires and a 21mm internal rim, our calculator starts at about 54 psi front and 67 psi rear. Stay inside Continental's hookless caps (73 psi for 25 and 28mm, 65 psi for 30 and 32mm) and the 2026/27 catalogue minimums (52 psi for 25 and 28mm, 43 psi for 30 and 32mm).

For your own number, use the tire pressure calculator.

Continental's limits for each size

A hooked rim has a small lip on each wall that locks the tire bead in. A hookless rim (Continental calls it TSS, tubeless straight side) has plain walls and lower limits. Internal rim width is the gap between the inside of the rim walls.

Size	Max on hooked rims	Max on hookless rims	Catalogue minimum	Internal rim width allowed
700x25 (25-622)	7.5 bar / 109 psi	5.0 bar / 73 psi	52 psi	13 to 21mm
700x28 (28-622)	6.5 bar / 95 psi	5.0 bar / 73 psi	52 psi	15 to 23mm
700x30 (30-622)	5.0 bar / 73 psi	4.5 bar / 65 psi	43 psi	16 to 25mm
700x32 (32-622)	5.0 bar / 73 psi	4.5 bar / 65 psi	43 psi	16 to 25mm
700x35 (35-622)	4.5 bar / 66 psi	4.0 bar / 58 psi	37 psi	17 to 27mm
650x30B (30-584)	5.0 bar / 73 psi	4.5 bar / 65 psi	43 psi	16 to 25mm

Maximums and rim widths are from Continental's product page. Minimums are from the PSI column of its 2026/27 catalogue, labelled there as min. to max. The catalogue also says: "This tire is Hookless compatible to its limited max. pressure. Please check wheel instruction and tire packaging for detailed information."

Worth knowing:

30 and 32mm top out at 5.0 bar (73 psi) even on hooked rims.
The 28mm stops at 23mm rims. On a 25mm internal rim, Continental's table points you to the 30 or 32mm.
The box is the final word. Continental says the hooked and hookless maximums, and the maximum inner rim width, are on the tire packaging and may differ between the two rim types.

Starting pressures by weight

Our calculator, tubeless, smooth roads, 21mm internal hooked rim. Front / rear, psi.

Rider + bike	28mm	30mm	32mm
60 kg (132 lb)	40 / 49 (below min)	37 / 46 (front below min)	34 / 42 (below min)
70 kg (154 lb)	47 / 58 (front below min)	44 / 54	40 / 49 (front below min)
80 kg (176 lb)	54 / 67	50 / 62	46 / 56
90 kg (198 lb)	61 / 76	57 / 70	51 / 63
100 kg (220 lb)	68 / 84	64 / 78	57 / 70

"Below min" means under the 2026/27 catalogue minimum (52 psi for 28mm, 43 psi for 30 and 32mm). Pump to at least that minimum.

For bar, divide psi by 14.5. On chip seal, the calculator's rough-road setting takes about 5% off (51 / 63 psi for 80 kg on 28mm). Inner tubes add about 5% (57 / 70).

On hookless rims

Where the table hits the hookless caps:

28mm: the rear at 90 and 100 kg (76 and 84 psi) is over Continental's printed 73 psi. The calculator caps it at 5.0 bar and shows 72 psi.
30mm: the rear at 90 and 100 kg (70 and 78 psi) is over 65 psi. Capped at 4.5 bar, 65 psi.
32mm: only the 100 kg rear (70 psi) is over.
25mm: at 80 kg the rear already wants 82 psi. A 28 is the easier fix, rim width permitting.

Heat eats into the margin. Continental says inflation pressure rises by roughly 0.17 bar (2.5 psi) for every 10°C, and that if the pressure then exceeds the hookless maximum, "safe usage of the tire cannot be ensured." It tells riders who face big temperature swings: "Do not inflate the tire to the maximum permitted hookless pressure." Pump to 73 psi in a cold garage, park in the sun, and you are over.

Your wheel maker's limit counts too. Continental's rule is to follow the lower value: its example is a 28mm tire allowed on 23mm rims meeting a rim allowed 25mm, so 23mm it is. Zipp, for one, says: "Zipp TSS wheel and tire systems should never be inflated to more than 5 bar (72 psi)." Our hookless road tire guide lists what each tire and wheel maker approves.

Rim width changes the number

A tire gets wider on a wider rim. Continental's own example is the 28mm GP5000 S TR, sized on a 19mm measuring rim: 0.4mm of width for every millimetre of rim. Our calculator uses the same rule and the same design rims (19mm for the 25 and 28, 21mm for the 30 and 32). Wider tire, less pressure. 80 kg rider plus bike, 28mm, tubeless, smooth road:

Internal rim	Width per Continental	Front / rear (psi)
15mm	26.4mm	63 / 78
17mm	27.2mm	60 / 74
19mm	28.0mm	57 / 70
21mm	28.8mm	54 / 67
23mm	29.6mm	52 / 64

Calipers beat estimates: type your measured width into the calculator. More in does rim width change tire width.

Quick checklist

Read your tire's sidewall and box. They beat any table, this one included.
Take the lower of the tire's and the wheel maker's limits.
Start from the calculator, never below Continental's catalogue minimum or above its maximum.
Check pressure before every ride, as Continental asks.
Adjust one wheel at a time by about 2 psi: chatter on rough tarmac means too high, squirm in corners too low.

To keep your numbers by the pump, print the tire pressure card.

Related on Pedal Brief

Sources and notes

Where the sources disagree

Hookless max for 30 and 32mm. Continental's product page (12 Nov 2026) and its UK hookless table list 4.5 bar / 65 psi. Launch-era coverage (BikeRadar, 21 Dec 2021; road.cc, 4 Oct 2021; Cyclingnews, 6 Apr 2022) and Cambrian Tyres' UK page said 5.0 bar / 73 psi for every size. We use Continental's current figures.
Max rim width for the 28mm. The product page and the UK hookless table cap the 28mm at 23mm internal. Launch tables (road.cc, Cambrian, BikeRadar) listed 25mm, and Cyclingnews ran 28mm tires on 25mm-internal Zipp 303 Firecrest rims. We use Continental's current 23mm.
73 vs 72 psi. Continental's product page prints 5.0 bar as 73 psi. Its UK hookless table prints "5.0 | 72", and the 2026/27 catalogue ends those ranges at 72, 108, 94 and 65 psi where the product page shows 73, 109, 95 and 66. 5.0 bar is 72.5 psi. We use the product page figures. Our calculator shows 72 psi at a 5.0 bar cap, because it rounds down at a cap. We have not changed the calculator.
700x35. The product page and the 2026/27 catalogue both list article 0102100, 35-622, as a GP5000 S TR (hooked 4.5 bar / 66 psi, hookless 4.0 bar / 58 psi, rim 17 to 27mm, catalogue minimum 37 psi). The catalogue prints the dimension as "700 x 32C". The UK hookless table lists 35-622 under the AS TR, with a 25mm max inner rim width, and the product page omits LazerGrip and ACT on this size. We show the product page figures.
650x32B. The UK hookless table and the 2026/27 catalogue (article 0101935, 32-584, 43 to 72 psi) list a 650x32B. The product page table lists only the 650x30B. We left 650x32B out of the main table.
Old riding-pressure advice. Continental's 2018 mounting instructions recommend, for a rider of about 80 kg, "about 0,5 bar below the maximum pressure." On a 28mm on hooked rims that is 6.0 bar (87 psi), far above our calculator and the reviewer figures below. The same document required hooked rims for tires of 5 bar or more, which predates the S TR hookless approvals. We don't use the 0.5 bar rule.

Method and caveats

Calculator figures come from seo/pressure_tables.py --case (a port of the live calculator): Berto's 15% tire drop fit, 45/55 front/rear split (our default for a road bike), rider + 9 kg bike, smooth road, tubeless, 21mm rim unless stated. The full method is on the road tire pressure guide. The calculator doesn't know casing stiffness or Continental's minimums.
Minimums come from the 2026/27 catalogue's "PSI*" column (min. to max.). The product page has no minimum column. The catalogue gives one range per size and doesn't say whether the minimum differs for tubes, tubeless, hooked or hookless.
Rim width ranges. The product page gives one "Permitted Rim Range (mm)" per size and doesn't split hooked from hookless. Continental UK's hookless table uses the same upper figures (21, 23, 25, 25mm).
Reviewer pressures are what each publication used for its own rider and rims, as dated, not Continental recommendations: Bicycle Rolling Resistance (March 2022, 17.8mm internal rim) used 80, 72, 69 and 65 psi as "recommended" for 25, 28, 30 and 32mm; BikeRadar (December 2021) rode a 28mm climbing test at 65 psi, the figure it says Silca's calculator suggested; Cyclingnews (April 2022) "settled on 55 front and 58psi on 25mm rims." Pedal Brief did not test these tires.

What we could not confirm

Packaging and sidewall figures. Continental says the packaging is the reference. We didn't see a box; if yours differs from the table, follow the box.
Whether the 2026/27 minimums apply on hookless rims and with tubes. The catalogue doesn't say.
Whether the 700x35 (article 0102100) is sold as S TR or AS TR, see conflict 4.
Price. Continental's US product page shows no price. The 2026/27 catalogue lists euro RRPs (93,95 for the 25 and 28mm, 94,95 for the 30, 32mm and 650b, 98,95 for the 35mm, checked 12 Nov 2026). Cambrian Tyres' UK page showed £84.95 SRP (12 Nov 2026). Neither is a US brand-store price.
ETRTO's own text. The 5 bar road hookless limit is cited through Schwalbe and Zipp, not the ETRTO standard, which is not public.

Spot an error? Email [email protected].

Sources

Disclosure: Pedal Brief may earn a commission if you buy through links on this page, at no extra cost to you. This version has no affiliate links. We have not tested these tires. Limits come from Continental; starting pressures come from our own calculator. Full disclosures.