Schuberth C3 Pro update: Liner swap

CMG readers may or may not remember my Schuberth C3 Pro review from last year. Those who remember might also remember I liked the helmet a lot, but it was just a tad big (I got an XL).

Of course, I’d gone to the XL because the L was too small – I figured I was just going to have to deal with the sloppy fit, or stop wearing the lid. Then, I heard about the “half size” liner.

From what I read on the Interwebz, some users had taken to putting the regular L C3 liner into the XL C3 Pro helmet. They weren’t necessarily intended to work together, but they fit fine, and offer a tighter fit than the stock XL liner. Intrigued, I ordered one.

Tighten up

As user reports suggested, the mismatched liner fit the helmet just fine, and did tighten the fit – not much, just enough. While the helmet had just the tiniest bit of play with the original liner, the new liner removed it. I was able to put in long days with the revised skid lid with no back-and-forth play.

The standard large C3 liner easily fits into the extra-large  C3 Pro shell.
The standard large C3 liner easily fits into the extra-large C3 Pro shell.

Is this a good mod for users who want to customize their XL C3 Pro’s fit? It certainly did the trick for me, but your mileage may vary.

While the liner fit the inside of the helmet well, I did find it would create a pressure point at front of my head sometimes. I imagine this is because the liner wasn’t specifically designed for this helmet.

The C3 Pro has many tweaks when compared to the original C3; most aren’t major, but those cumulative changes might mean you won’t find the new liner as comfortable as the original, despite the better fit.

However – if you’ve got a C3 Pro in size XL and you find the fit isn’t working for you, I’d recommend trying it; if nothing else, maybe you can borrow a C3 liner from a friend to see if it works. It can take an expensive helmet and make it work much better for you – it did for me.

There are several other possibilities available by mixing and matching liners and cheek pads as well; some users are turning M helmets into L, and there are other custom fits made do-able if you’re willing to invest the money into buying the parts.

Also remember – this is modifying the helmet from its original design, and may make it more dangerous. It’s possible that somehow this could make your head explode, or cause your children to be born without hair. If you somehow manage to ruin your life as a result, don’t come whining to us. You know what they say about taking free advice off the Internet.


  1. I am not rich enough to go buy a brand new helmet and I am big. I got my hands on a XXXL C3 in perfect condition though. I thought I’d be set when It arrived ( I bought it online) the liner and cheek pads are tagged XXXL 64/65. When I put the helmet on my face is smashed skidways cheek to cheek even w/ out my glasses on and pressure on my forehead is too great to bear for even 2 minutes, it’s also pushing my eye brows down. If I tale the cheek pads out completely I have room sideways and freeair ear space ( my ears do not touch the speakers. But then I still have the pressure on the forehead which is only slightly less than w the cheek pads in, still unbearable. when I close the face down the Chin seal hits me in the middle of my chin and I have to pull it down to get it under my chin to close the helmet. ( These are made in Germany! I have a Big Ole German head, I’m 6’2″ and 290 you’d think a 600.00 helmet from Germany ( that’s what is cost back then, I paid 120.00 ) would have some way to adjust all this. 1. cheek pads that are much less thick, I have to reach in with my finger to unfold my ears! #2. head liner that can be adjusted to allow a more oval shape so the helmet can seat down a bit. #3. the back of the helmet has straps that connect to the chin straps to pull forward, and the cushion part thickness is too great on that top liner so my head is too far forward increasing that pressure on my forehead. @ Just above my eyebrows I am getting a consistent 63.5 , Just under my ears and under my nose ( Moustache height LOL ) what I would think we would be calling cheek measurement’s 61. 77 under the chin and around the top of the head over the ears. No one ever asks for those last measurement’s so I don’t know what to do. LOL I have never had a helmet, I have just been real lucky my whole crazy Motorcycle life been riding for over 30 years. I thought when I got this helmet there were adjustable liners, I didn’t read far enough to see that that seems to only apply to xl and under. I think that my cheek pads being 25mm and my head liner being stock that a few mm from every direction would do the trick but I am not seeing any way to do it without taking everything out making something that fits in there. which would be superfluous to even having a helmet at all except for wind resistance as the things not going to be protecting me if it rips off in a crash. I did take everything out and put it on with nothing and that is ridiculous big just in case anyone wonders LOL. what do Big MFER’s do for helmets?

  2. Thank you, Zac. I am having the same issue with the XL Schubert. The L too tight, the XL too loose. I appreciate your advice. One question: If the C3 L liner works, would would the C3 Pro L liner not work? It would seem the logical thing to try.

    • I’m not sure;call Schuberth customer service, and they might be able to help. It’s been a while since I did this, and I don’t remember what they said at that time.

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