• Any reason I can't take the Schrader valve core out and quirt 30ml of sealant into my Brompton tubes? Fed up of rear punctures.

  • I've heard of people using sealant in tubes and I know you can buy pre-slimed tubes so I see no reason not to give it a shot. Can you not buy more durable tyres for Bromptons?

  • How many have you had?

    In two years of ownership I never had one, Paddington to Holborn 2x per day, with the marathons.

    time for a new tyre?

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