Hi All,

         Just a query about a carbon fibre section of my mountain bike frame that has a crack on it, would the repair resin be suitable? I've attatched a photo, hope it helps.

Many thanks in advance

Ian Todd

Hi Ian,

I can't actually see the crack in the photo (or maybe I can but it's not clear) so I'm not quite sure how bad the damage is. Unless the crack is very minor, simply running a small amount of resin into it is unlikely to restore the strength to to the damaged area. If it is very minor then using a small amount of epoxy (like the Epoxy Rapid Repair Resin) would be a good idea to seal the damaged fibres, preventing water ingress. If it's more serious then you'll need to add some carbon fibre cloth, along with the resin, to restore the strength. A repair in this way would be done in a very similar manner to a carbon fibre fishing pole repair and as such, many of our customers actually use our Carbon Fibre Fishing Pole Repair Kit to make carbon fibre bike frame repairs. Take a look at the video that accompanies the fishing pole repair kit to get a good idea of what's involved.

I hope this helps,

Matt

Matt Statham
Easy Composites / Carbon Mods - Technical Sales

Hi Matt

            Thanks for the information, only thought i have though is the external diameter of the piece where the crack is, is quite specific, how much thicker would the wrap make the diameter. Other than that sounds a fantastic idea, as to buy a new seat unit is 10 times the price of the kit

Many thanks

Ian Todd

Once round with the 90gsm fabric would add about 0.1mm to the redius (so 0.2mm overall to the diameter). This might be fine but if it's a very stug fit then it could be a problem.

Matt Statham
Easy Composites / Carbon Mods - Technical Sales

Hi Matt,

            Once again thanks. That seems very acceptable think i could get away with up to 0.3 or 0.4. So will be ordering the kit this weekend.

Many many thanks for your advice.

Ian Todd