Polycarbonate or CNC bashguard?

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  • Polycarbonate or CNC bashguard?
  • Using it freeriding, would love some reccomendations 🙂

    Could anyone elaborate as to why? I’m thinking the cnc one will be more prone to snapping?

    Premier Icon cp
    Subscriber

    CNC certainly look a lot nicer IMO

    Polycarbonate tend to slide better on impacts.

    Junkyard
    Member

    IME plastic ones break and crack more often than metal ones

    What do you think is stronger metal or plastic?

    mickmcd
    Member

    We once made these funny wheels for clearing land mines ,they were plastic, a particularly tough plastic ,I tend to think plastic is tougher and absorbs energy better, however maybe a tough grade of aluminium would also work just fine rather than a high tensile grade…..heads off to see what I can cnc machine next

    Well I’m thinking thick chunky plastic will be a lot more impact resistant than thin metal?

    Junkyard
    Member

    I have cracked and seen cracked a number of plastic ones but never a metal one

    mickmcd
    Member

    PVD breaks every kind of bashguard he’s tried,quite interesting to watch his battles with stuff

    legend
    Member

    Junkyard – lazarus
    I have cracked and seen cracked a number of plastic ones but never a metal one

    I’ve bent various metal ones, and I’ve cracked plastic ones.

    Take your pick imo. my preference is static plastic guard behind the chainring

    smatkins1
    Member

    I recently noticed cracks appearing around the bolt holes of my Blackspire plastic one.

    If it did break while I’m out I’d be stuck, because the bolts would be too long to hold the chainring in place without the bashguard!!!

    For this reason I replaced it quickly with a metal one.

    Premier Icon Yak
    Subscriber

    Definitely polycarbonate – have a look at your inbox 😉

    Premier Icon Shackleton
    Subscriber

    I decided to go with polycarbonate on the grounds that anything I hit that hard I’d rather the force went into breaking the guard rather than possibly damaging my cranks/bearings/bb area. A mate stacked his alu one onto a boulder and twisted the spider on his cranks by a few mm. You could barely see it by eye but you could tell when pedaling or changing gear!

    I’ve been through 3 polycarbonate ones in the last 7 years and they have all failed around the bolt holes (usually just one) but never came off or broke in a way that left me unable to pedal (plus I still have a granny ring for real emergencies).

    I treat them as a sacrificial and deliberately weak link in a chain of much more expensive parts.

    coatesy
    Member

    One problem with polycarbonate is that certain chemicals (such as oils and solvents likely to be found in chain cleaners and lubes) can cause the plasticisers to migrate from it, leaving you with a very brittle object. Some manufacturers do mention this in the instructions, but you’ll have already bought it by then,and how many people actually read them anyway?

Viewing 15 posts - 1 through 15 (of 15 total)

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