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(Pic from BikeRumor)
At what point does one just go **** it, and buy a motorbike?
If there's a bike that DEFINITELY needs extra stopping power it's a fatbike trundling about a beach
Aye - because that's the only place fatbikes are ridden.
Aye - because that's the only place fatbikes are ridden.
I dunno. They must get ridden elsewhere.
Do you need extra braking power 'cos of all the extra grinning?
Dont feed the fatbike troll please? 🙄
that's it ... I'm getting a KTM 350 free ride ...:-)
Sensitive wee boy ain't he!
Is the fatbike troll anyone being negative or the "OMG grin-factor" alternative?
Imagine teh extra grinz from fat biking with moar discs!
That looks like deore calipers and 203 rotors? That'd stop a car.
Is to alleviate some kind of braking torque steer and crown flex as is such a wide front axle?
I'm all for the fatbike thing, but, I can just imagine some bell-end in marketing at Enduroland , seeing that and rubbing his hands with glee at the thought of 2016 models ( yawn to the " model year" thing ) selling to British armchair bikers for another grand.
Is the fatbike troll anyone being negative or the "OMG grin-factor" alternative?
Its normally people making preconceived comments regarding something they either know nothing about or have very little experience of. 😐
maybe it's for larger people?
not being clever, simple physics. 18-20 stone takes twice as much to stop than someone 9-10 stone (ignoring the bike weight)
Plus it means they can sell a new hub.
So, what is the genuine reason for it, as fatbikes seem to be getting lighter, so it can't be to do with the weight?
Is it to exploit the extra grip of the front tyre? Is there more grip due to the extra footprint, that having more stopping power can utilise?
Could it be to do with the loaded down back of beyond tour end end of the market - extra stopping for a loaded up bike? But, if that's the case then why not the same for normal touring bikes?
I remember this ad in the back of MBUK....
[img][URL= http://i87.photobucket.com/albums/k148/alexstuart/FAF5D3D7-727E-4E96-9F4B-B07C8FC4EDD8-1211-0000029BE9E6F5F9_zps61648fe1.jp g" target="_blank">
http://i87.photobucket.com/albums/k148/alexstuart/FAF5D3D7-727E-4E96-9F4B-B07C8FC4EDD8-1211-0000029BE9E6F5F9_zps61648fe1.jp g"/> [/IMG][/URL][/img]
Or is it just marketing as a fatbike is unlikely to ever see the same hills that a DH bike of equal weight (inc with a fatty on board) will ever see?
My money's on the boring answer - bridge-less fork needing more even forces to stop the crown twisting. It is a pretty good way to extract more cash from the punters though!
stumpy01 - MemberSo, what is the genuine reason for it, as fatbikes seem to be getting lighter, so it can't be to do with the weight?
Is it so that pictures of their bike get posted on the internet?
tbh I thought Risse Racing had gone under years ago - and I was happy with that
My money's on it being for the same reason as 650b
I'll never get twin discs. I'm not into gimmicky front ends. And it wouldn't work on my Lefty.
Cue in oh so tasteful Magura Big Twin ad from few years back...
Me too beaker 😳
less heat build up in the front brake... less brake fade... sounds like a potential selling point to me!
That advert says "Fat suspension hub" 😯
Fat...
Must be for that 17mm axle and 4 bearings!
less heat build up in the front brake... less brake fade... sounds like a potential selling point to me!
Have you considered not dragging your brakes on your silly bike? Maybe you're grinning so much you've forgotten how?
do they come in purple,,,,,,, if so im in 👿
Solution without a problem
Solution without a problem
I dunno. Might be able to avoid accidents like these:
My OCD can't cope with the discs being the opposite way round to each other!
I dunno. Might be able to avoid accidents like these:
Eh? Thats the slowest crash ever.
Im going with 777b wheelsets. I will pay poor good riders to say its amazinh and place monthly full page ads in mbuk which will buy me 10/10 in product shootouts.
monkeyfudger - MemberImagine teh extra [s]grinz[/s] profitz from [s]fat biking with[/s] moar discs!
Pointless tossery.
Look good though, and it's 'one louder' for the Trail Centre car park.
They'll sell millions.
maybe it's for larger people?
That's not what fatbike means andy.
I'll never get twin discs. I'm not into gimmicky front ends. And it wouldn't work on my Lefty
Very good 🙂
I'm guessing there won't be any increase in stopping power - the braking force is distributed equally between both calipers - right?
If so then your adding weight and complexity purely to dissipate heat better
On a fat bike
Really!
[i]I'm guessing there won't be any increase in stopping power[/i]
The amount of friction material touching a disk is doubled so it must lead to some increase? And on a fat bike the tyre losing grip and the wheel locking under braking is significantly less of a problem than on a normal bike.
I'm guessing there won't be any increase in stopping power - the braking force is distributed equally between both calipers - right?If so then your adding weight and complexity purely to dissipate heat better
WTF ? Why in that case do all motorbikes above say 600cc use 2 discs ? Because it improves performance. Ok, so you need a master cylinder that works in accordance with it... but of course it improves performance.
WTF ? Why in that case do all motorbikes above say 600cc use 2 discs
Like I said - heat dissipation reducing fade
My Daytona has them
Like I said - heat dissipation reducing fade
Yes, partly... but mostly the stopping power.
Road bike motorbike brakes VERY rarely suffer from heat issues apart from on track.
Yes, partly... but mostly the stopping power.
Hows that then - You have doubled the braking surface area but halved the power to each caliper. Your hand is still applying the same force on the lever
Hows that then - You have doubled the braking surface area but halved the power to each caliper. Your hand is still applying the same force on the lever
No because your master cylinder has a larger internal bore, meaning it's pushing more fluid at a given amount of lever travel/pressure.
That's why aftermarket Brembo RCS masters come in say 16, 18 and 20 which is the bore, meaning it pushes more fluid.
You can fiddle with bore diameters on a single disc setup and achieve exactly the same result
ndthornton - MemberYou can fiddle with bore diameters on a single disc setup and achieve exactly the same result
No, because you only still have 1 disk to give you braking surface. I accept you can make it better by having a larger ratio master cylinder, but usually at the expense of feel.
I think i'll call it a day here as we're not going to agree and it will just frustrate me 🙂
enjoy.
Someone mentioned bores?
Ok whatever
BTW - you need a smaller master cylinder bore (or a larger slave) to increase braking power. Not the other way around.
Breadcrumb has it
breadcrumb - Member
My OCD can't cope with the discs being the opposite way round to each other!
Clearly they're the opposing way around as one only works backwards, so it's a fatty bike with a reverse gear and brakes to suit.
WTF ?
Brakes don't have slave cylinders, clutches do though 🙂
Why in that case do single Supermoto caliper systems run a 13mm bore master cylinder and a Double disk Superbike system run a 20mm bore ?
Why in that case do single Supermoto caliper systems run a 13mm bore master cylinder and a Double disk Superbike system run a 20mm bore ?
Well I should think (and Im no brake expert) that its because on a double disc setup the brake fluid is being split between 2 calipers, halving the volume of fluid displaced in each slave piston and causing the pads to only retract by half the distance they would on a single disc setup. Therefor you need to increase the volume of fluid being displaced by the master to compensate and stop the pads rubbing.
That's the thing you see - adding more calipers or more pistons to the same caliper or just increasing the size of a single piston (it all has the same effect) means you increase power at the expense of pad retraction. If you go so far with this you need a bigger master cylinder which cancels out your efforts. However you do gain better heat dissipation by doing this - which is the only reason to bother.
you don't ever get something for nothing