- News
- Reviews
- Bikes
- Accessories
- Accessories - misc
- Computer mounts
- Bags
- Bar ends
- Bike bags & cases
- Bottle cages
- Bottles
- Cameras
- Car racks
- Child seats
- Computers
- Glasses
- GPS units
- Helmets
- Lights - front
- Lights - rear
- Lights - sets
- Locks
- Mirrors
- Mudguards
- Racks
- Pumps & CO2 inflators
- Puncture kits
- Reflectives
- Smart watches
- Stands and racks
- Trailers
- Clothing
- Components
- Bar tape & grips
- Bottom brackets
- Brake & gear cables
- Brake & STI levers
- Brake pads & spares
- Brakes
- Cassettes & freewheels
- Chains
- Chainsets & chainrings
- Derailleurs - front
- Derailleurs - rear
- Forks
- Gear levers & shifters
- Groupsets
- Handlebars & extensions
- Headsets
- Hubs
- Inner tubes
- Pedals
- Quick releases & skewers
- Saddles
- Seatposts
- Stems
- Wheels
- Tyres
- Health, fitness and nutrition
- Tools and workshop
- Miscellaneous
- Tubeless valves
- Buyers Guides
- Features
- Forum
- Recommends
- Podcast
forum
Tyre pressure confusion
I put a set of continental GP urban 35mm tyres on my gravel bike for some comfortable road riding. All the tyre pressure calculators I've used suggested 45 - 50 psi as optimal for this tyre size based on total weight of 75kg , but the tyres themselves say min 65 psi. Any idea why the manufacturer min would be so high relative to the calculators?
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.
Latest Forum Topics
Latest Comments
- brooksby 26 min 50 sec ago
RONNIE PICKERING!
- lesterama 34 min 56 sec ago
Nice. I'd ride that Madone now.
- HLaB 46 min 26 sec ago
I hope the ones on the kids bike bus improved too, after reading the first one I decided I couldn't brave it
- Geoff Ingram 47 min 31 sec ago
Completely agree. At 80kg or so all up 45psi is good for my gravel bike with 39mm tyres. And after a fair while, when it drops to 35 I put it up to...
- mattw 1 hour 4 min ago
This one seems to work the other way, and be genuine Nimbyism - Pimlico wanting to keep its passports....
- HollisJ 2 hours 15 min ago
Thankfully all the terrible spelling errors in my reviews are erased by the skillful subbing team before they go online. ...
- cyclisto 2 hours 49 min ago
There is no wrong presenting such expensive kit. Of course mostly is for American dentists, but for me any bicycle above 2K seems anyway overpriced...
- Velophaart_95 3 hours 14 min ago
CX is an off-road discipline - tricky descents are part of the sport - and unfortunately there will be crashes. And remember the crashes at Crans...
- eburtthebike 4 hours 46 min ago
I'm sure those driver who are so concerned about trees will enjoy this pic
- Secret_squirrel 5 hours 5 min ago
if only there was a metal that could be bent back in your LBS with minimal risk of it snapping or fatiguing....
Add new comment
3 comments
That is a massive pressure for those conditions, I run 65 psi for 32mm tyres with 110kg all up weight and don't have a problem with pinch flats even on our rough roads. I would use the chart pressures which seem reasonable to me and ignore the manufacturer as they are probably assuming heavier all up weight and lack of maintenance.
Completely agree. At 80kg or so all up 45psi is good for my gravel bike with 39mm tyres. And after a fair while, when it drops to 35 I put it up to 45 again. 65psi is for my bike with 28mm tyres.
Says it can go up to 85 psi. All I can think of is something about the tyre wall that needs a higher pressure but it is out of step with the charts as you say.