- 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
- Buyers Guides
- Features
- Forum
- Recommends
- Podcast
forum
Mavic Cosmic Pro Carbon SL UST Disc
Hello,
So my new Ribble Aero 883 arrived and had Mavic Cosmic Pro Carbon SL UST Disc on, I have added some sealent, not sure how much in Millilitres? Also my rear keeps deflating, vry slowly but noticably over a day. I have deflated and repopped the tyre bead back on, I am putting roughly 60psi into them, is this too little? Any advice or help would be appreicated
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
- Cayo 5 min 11 sec ago
Except that a human being is at least theoretically better at stepping out of the way when something goes wrong.
- nick_stokie 16 min 6 sec ago
I understood that traditional helmet strap clips had quite a low breaking strength so that if you got twisted/tangled in a crash they would break...
- Argos74 16 min 9 sec ago
Ah, Thérèse. Approaching irrelevancy like her leadout train has just fallen away. She's so gammon, she's more uncomfortable with pineapple than an...
- john_smith 22 min 31 sec ago
Are you absolutely sure that is genuine? What do you hope to achieve by posting it here?
- IanMSpencer 1 hour 52 min ago
I don't think you need have any concern about cycling safety improving with #toxicadi Ashley Neal advocating for us on protected cycle lanes....
- andystow 1 hour 56 min ago
Court case thrown out after attorney can't find parking near courthouse. https://abovethelaw.com/2024/04/case-tossed-when-lawyer-cant-find-any-pa...
- mark1a 1 hour 59 min ago
Surely it's the sensor that is 8K, not the lens?
- Nagai74 2 hours 22 min ago
No proof of this, but wouldn't you imagine that the majority of drivers have ridden pushbikes at some point in their lives, even if only as kids?
- chrisonabike 2 hours 29 min ago
Indeed... though to be fair the Dutch have some contraflow cycling in narrow streets. Although I think increasingly they would try to avoid this ...
- NPlus1Bikelights 2 hours 46 min ago
The inventor of the wall mounted triangles needs to be shamed. They only take a standard bike and damage the rims. Also the wheel is secure but the...
Add new comment
5 comments
If the Rim tape isn't seated perfectly this will also leak, I had to replace the Rim tape on one of my Hunts due to slow leaks
If all else fails try mounting the tyres initially using some car tyre bead sealer, like this:
https://www.tyrebaydirect.com/product/bead-sealer-950ml/
Thank you! I will do this tonight, I checked the tyre and it was flat again this morning. I will go through this process and let you know what happens
Ensure they are seated by inflating hard and fast, a compressor helps. Go high on pressures. Then add sealant, about 40-50ml. Now take the wheel, hold it in two hands at 3 and 9, ajd shake it, rotate a bit, shake, rotate, etc. You are trying to work the sealant up inside the tire wall. Finish at the valve, and shake very vigorously. Then put the wheel flat, rotate slowly. Flip over, repeat. If it goes down, repeat. If it keeps going down, submerge in water to see if it leaking at the valve. If so add maybe 10ml more sealant and ensure you shake it over the valve again.
to seat them initially I inflate to tyre maximum. Then deflate to what I ride at normally. As far as how much 30 - 60 ml depending on terrain. I would also check that your valve is nice a tightly seated as that's where I had a leak when I first went tubeless.