Cracked Brompton rear mudguard

Discussion in 'Folding Bikes' started by doginabag, 28 Mar 2017.

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  1. doginabag

    doginabag Well-Known Member

    I noticed a crack on my rear mudguard yesterday and was wondering if it is a common issue or not before I head down to the store I bought it from.

    The crack has originated from the jockey wheel bracket where you would expect the highest stress concentration when folded and being pushed around. However from the photo you will also see that the bracket is bent, which will have caused all the stress to be concentrated on one side rather than being more evenly distributed. It has been that way from new and despite irritating my OCD I put it down to the quirks of a hand built bike and thought no more of it. IMG_20170328_065316.jpg IMG_20170328_065327.jpg
     
  2. alicat

    alicat Guru

    Location:
    Staffs
    How old is the mudguard? Looks like something has been dropped on that side of the mudguard or the bike has been dropped at some point.
     
  3. bikegang

    bikegang Mod before ride, my bike my style...

    Location:
    Newcastle, England
    Do you roll your brompton a lot? yes, the mudguard tend to break, some have installed reinforced plate to share the load.
     
    chriscross1966 likes this.
  4. OP
    OP
    doginabag

    doginabag Well-Known Member

    It is 6 months old, maybe a week or two older.

    The bike is well looked after and has never been dropped or crashed. The crack originates from the corner of the jockey wheel bracket on the side that it leads towards which is exactly where you would expect the peak stress to concentrate. The crack doesn't break out through the side of the mudgiard so I disagree that there is any suggestion that the bike has been dropped.

    I have tried it on a few occasion but generally no, they really don't roll well even on a flat tiled floor. The only rolling it does when folded is just enough to get it behind the seats on the train.


    I have just popped into my local Evans store. They kindly offered to sell me a new mudguard and looked perplexed when I mentioned a warranty. They then tried to fob me off saying that Bromptons only come with a 6 month warranty on the frame and nothing for other components. :laugh:
     
    bikegang likes this.
  5. Mrs M

    Mrs M Veteran

    Location:
    Aberdeenshire
    Aw, that's not good.
    I'd contact Brompton directly and advise what Evans have said.
    Your cracked mudguard and another cc members Brompton breaking in half have put me off them a bit :sad:
    Hope you get it sorted.
     
    bikegang likes this.
  6. bikegang

    bikegang Mod before ride, my bike my style...

    Location:
    Newcastle, England
    yes, 1 year warranty should be there for all parts.
     
  7. OP
    OP
    doginabag

    doginabag Well-Known Member

    Always worth remembering roughly situations like this, no matter what a manufacturer or retailer tries to tell you, all items sold within the EU are covered by a compulsory 2 year warranty as outlined in European Directive 1999/44.

    Two years left to enjoy that protection. :laugh:
     
    bikegang and Drago like this.
  8. I've been through a few rear mudguards by 'parking' the bike with a bit too much enthusiasm so the little wheel bounces a bit as the back wheel goes under. I probably did the first one within six months too. It also bends the bracket out a bit on one side. I'd just buy a new one to be honest.
     
  9. rozzer1971

    rozzer1971 Regular

    Location:
    Basingstoke
    There's a seller on eBay offering a reinforcement plate for the mudguard. http://www.ebay.co.uk/itm/MULTI-S-M...hash=item238035b240:m:mqhfZPO2cEAcRbEraiR68ZA
     
  10. ryanme

    ryanme Member

    Location:
    Somerset

    The cracking of mudguards is caused 99% by the user .. the front cracks when you fold the back wheel without turning the wheel.

    The rear mudguard cracks when you fold the wheel under and bounce it off the roller ..

    New blades are like £10...
     
    Mrs M likes this.
  11. ryanme

    ryanme Member

    Location:
    Somerset
     
  12. Bromptonaut

    Bromptonaut Rohan Man

    Location:
    Bugbrooke UK
    The rear mudguard on L models has a finite life but I'd expect it to be in years not months. My first B was an L5 with 5 speed hub and no rack (M5L in current nomenclature). Mudguard, which originally lacked the rubber spray flap, lasted about 7 years before delaminating and cracking.

    My second was an M6R and is much easier to manoeuvre folded - for example placing it between seat backs on a train.
     
  13. Fab Foodie

    Fab Foodie hanging-on in quiet desperation ...

    If you need to wheel it around a lot, add a rack. Much easier.
     
  14. Crankarm

    Crankarm Guru

    Location:
    Nr Cambridge
    Sorry but there is no way that this is a warranty issue for your bike. It is either damage caused by use or could be considered fair wear and tear given all the other scratches on the mudguard. How do you explain all the other scratches on the mudguard? Also the mudguard is slightly misshapen as well. If it was in a mint and unmarked condition you MIGHT have a slim chance of getting a replacement under warranty. My Brompton is 12-13 years old and has covered a fair few miles and been folded and unfolded hundreds if not thousands of times and it's mudguard is in far better condition than yours. The mudguards are pretty robust. Yours has taken some sort of hit or strike at some point causing it to crack. So I don't know what you are doing to yours but you need to take more care of it. Perhaps be more mindful of the surfaces you are folding and unfolding it on? In any case a replacement mudguard is not going to be that expensive. Either buy a new one or get some Superglue to repair it. But sorry that is NOT a warranty issue so no point going on about being fobbed off or EU directives.
     
    Last edited: 31 Jan 2018
  15. OP
    OP
    doginabag

    doginabag Well-Known Member

    The scratches come from it being slid in and out of storage areas on trains. Obviously is has taken a wack of some sort, probably while being loaded on a train. But my point is that a bike that is meant to be folded, and rested on the mudguard when in the folded position should be more resilient and I still firmly believe that likelihood of breakage was increased by the badly installed roller for reasons already explained. This kind of thing falls well inside my area of expertise.

    However, dealing with Evans turned out to be painful and not at all worth my hassle for the value of the part to be replaced so I left it.

    I have a new set of black ones on the way now to finally replace it and save my soggy botty, and have some ideas for a more robust fixing method that should better transfer the loads through the bike when in the folded position, taking the mudguard out of the load path all together.
     
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