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Rear Tire won't hold Air (On Arrival)

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    Rear Tire won't hold Air (On Arrival)


    I just unboxed my new Sur Ron today. The rear tire arrived flat. When I pressurize the tire, the air quickly (and audibly) leaks out between the rim and the tire near the valve stem, and the tire is flat again within a few seconds.

    Does anyone have an idea what is wrong or how to fix it? I've never worked on a motorcycle or mountain bike before so I am unsure how to solve this.

    Has anyone run into this problem before? I contacted Luna but haven't heard back from them and I am itching to ride ASAP =).


    I would suggest (Being you are not a mechanic) take the tire to a Motor-cycle shop and have them replace the Tube.

    Buy a Heavy Duty tube to avoid future problems.

    I`ve been waiting for a month now for 2 spokes. Everyone is having delays getting parts.

    If in the next few months Luna sends you a tube. keep it for a spare.


      Thanks for the tip, dirtman.

      Should I go to a motorcycle shop or a mountain bike shop? It's still unclear to me if these are motorcycle wheels/tires or bike ones!


        Originally posted by farmlife View Post
        Thanks for the tip, dirtman.

        Should I go to a motorcycle shop or a mountain bike shop? It's still unclear to me if these are motorcycle wheels/tires or bike ones!
        It's a lightweight M/C rim laced to a fairly unique hub in the rear & 110x20mm mtb hub in the front.
        Any M/C shop will service your rear, only some bicycle shops will take the job, you have to call & ask them.


          Thanks X-Nitro!


            Hi Josh,
            That sucks it came with a pinch flat, I feel for you.

            However, I would certainly not want to be depending on a shop for a very easy to fix problem, especially during a pandemic.

            We all have to start somewhere and learning to change a tube or even better repair a tube, will save you money and help you be more self reliant while also gaining knowledge about your bike. You'll need to be able to do things like adjust the chain anyways as you get some miles on it.
            The basic tools you need should cost less than one repair at a shop and the satisfaction when you're done is priceless.
            It really is easy with a little help to get started.

            First, order a couple of spare tubes. You'll want one to replace the leaky one and have another spare on hand. Even better to try to patch the original one first, but always good to have a spare tube around.


            Also order a set of tire spoons:

            Get a valve core remover:

            This tool is not needed but sure does make things easier:

            Patch kit:

            Read this DIY tread:

            Then watch a few videos on how to change a tube:

            These tires are softer and much easier to change than larger, stiffer MC tires. It's a 10-15 minute job once you get the hang of it.
            If you want to get on the trail faster than waiting for stuff to be delivered, any decent MC shop will have the tools you need and a patch kit. Chances are the leak is a pinch flat from the installation and repairable, that's my best internet diagnosis. haha

            Good luck and let me know if you have any other questions!

            Last edited by Lost Roadie; 07-16-2020, 10:37 AM.
            Adventure without Risk is Disneyland.


            • AZguy
              AZguy commented
              Editing a comment

              A bicycle will love you more the more you love it

              Unless you go o-ring on the chain (not sure if it already one) you'll definitely not want to depend on anyone else to lube the chain and even if o-ring get used to chain care

              Minor adjustments like brakes would be good to feel comfy with

              Tires are pretty easy and it's nice to be able to do them yourself... they can be flat-proofed so it's not like the bad old days where dealing with a flat was something you not only should be able to do, but even do it trailside... but those were the bad-old-days...

              Tools for this work are very inexpensive and most all more than pay for themselves with one use

            While on the road, I noticed that my wheels were wobbling. I checked the tires for flats. I tried to fix it for the next trip, but the same thing happened. This time, I started to wonder "why does my bicycle tire keep going flat?". It could be something sharp stuck in the tire of the bike that I can't see. I realize worn tires are also a cause. Old tires are prone to cracking and breaking, and their tubes often expand beyond their average size. Another reason to consider is that the sharp corners of the spokes can poke into the bike's tubes, eventually causing a puncture if they are not adequately covered with duct tape.
            Last edited by Robert07; 12-13-2021, 05:43 AM.


              Might want to check the valve stem as mine were a little loose out of box. After tightening, no pressure loss. I will check the new Sur Ron that just got delivered & unboxing.