Author Topic: front mudguard attachment query  (Read 321 times)

front mudguard attachment query
« on: October 16, 2020, 03:15:16 pm »
What, if any, reason is there why the front mudguard should be attached to the front of the fork crown, rather than the back?
I have up to now attached it to the back with no ill effect (reason being so if necessary it can be removed independently of the light) but the instructions on a new pair said attach it to the front if possible.
Was just wondering if there is a good reason?
It is what it is. It's not what it's not, so it must be what it is.

LittleWheelsandBig

  • Whimsy Rider
Re: front mudguard attachment query
« Reply #1 on: October 16, 2020, 03:30:44 pm »
The further forward the front of the mudguard goes, the less water and muck chucked from the front of the mudguard up over the bike and rider.
Wheel meet again, don't know where, don't know when...

citoyen

  • Occasionally rides a bike
Re: front mudguard attachment query
« Reply #2 on: October 16, 2020, 05:21:45 pm »
The further forward the front of the mudguard goes, the less water and muck chucked from the front of the mudguard up over the bike and rider.

The flip side of that is the further forward it's fixed, the more water and mud chucked up over the bottom bracket and feet...
"The future's all yours, you lousy bicycles."

LittleWheelsandBig

  • Whimsy Rider
Re: front mudguard attachment query
« Reply #3 on: October 16, 2020, 05:25:01 pm »
Some of us use mudflaps anyway, because no front mudguard comes down low enough at the back to keep your feet and drivetrain clean. If the mudguard did extend low enough, the mudguard would catch and crumple the first time you roll off a kerb.
Wheel meet again, don't know where, don't know when...

zigzag

  • unfuckwithable
Re: front mudguard attachment query
« Reply #4 on: October 16, 2020, 05:30:25 pm »
there's usually a larger hole at the back of a fork (for a countersunk allen nut), and the mudguard bracket slot is cut for a smaller diameter screw. some forks have only one threaded hole at the back, just for the purpose of a mudguard. it doesn't make much difference whether front mudguard is few cm fore or aft, really.

Re: front mudguard attachment query
« Reply #5 on: October 16, 2020, 08:20:46 pm »
dating back to nutted brakes (rather than ones with Allen Key fixings) mudguards always used to be designed to fit to the back of the fork crown not the front.

However given that 'standard' caliper brakes are effectively now AK ones and sandwiching a mudguard bracket (with a 6mm slot width) is easy at the front of the fork and difficult at the rear, maybe some mudguard manufacturers have changed their designs.

FWIW I think that older mudguards mounted to the front of the fork crown (in the absence of a much longer non-standard mudflap) look a bit crap and makes the bike get very dirty.  If you go too far the other way (eg with SKS longboards) they are indeed vulnerable to damage when dropping off kerbs etc, in ways that a mudflap isn't.

Regarding forward throw of crud from the mudguard; to do much good in this regard the tip of the mudguard needs to come well forwards such that nothing can be thrown (tangentially) off the wheel such that it goes forwards and upwards, only forwards and downwards.    Where a tyre throws muck off and how hard depends on a lot of things including tyre design, road conditions, bike speed, air speed, mudguard clearance and wheel diameter. Stuff gets thrown off more violently (for any given road speed/tyre design) when the wheel size is smaller.  Also any given radial clearance between the mudguard and the tyre needs to 'scale' with wheel size, else mudguards on smaller wheels need to have a bigger 'wrap' to keep muck from flying out in peculiar directions.

cheers

Re: front mudguard attachment query
« Reply #6 on: October 16, 2020, 10:54:36 pm »
Cheers all. They do do a long version where the front extends further forward but I didn't go for them cos I don't notice a particular problem with spray from the front end, but will see how I get on
It is what it is. It's not what it's not, so it must be what it is.