Making a disc brake ?

[roofman]

Triumph Rocket3 front wheel...big and meaty with twin discs and 20mm spindle

 

[outofthefire]

Aren't car tyres better on a trike?

 

[addjunkie]

Triumph Rocket3 front wheel...big and meaty with twin discs and 20mm spindle
View attachment 359153

That would fix both the brake and tyre issue in one go

 

[Pete.]

Many brake discs are waterjet cut from 400-series stainless then send for heat treat and grinding. I knew a place that used to run 2 waterjets they had a regular order for cutting them.

 

[Morrisman]

That wheel looks exactly the same as my Fazer wheel.

If you use a rear wheel on the front your going to have a big cush drive space on one side where the sprocket goes.

I'll put some sort of cover over that.
A proper twin disc front end would have been the logical obvious choice, but.....

 

[Morrisman]

Aren't car tyres better on a trike?

I think that depends on the steering geometry, rake, trail etc.

Triumph Rocket3 front wheel...big and meaty with twin discs and 20mm spindle
View attachment 359153

I've already built the front end spindle and rockers etc, to suit 1", but if it comes down to it it can be changed.

There's no such thing as a mistake, just more welding.

 

[roofman]

I think that depends on the steering geometry, rake, trail etc.


I've already built the front end spindle and rockers etc, to suit 1", but if it comes down to it it can be changed.

There's no such thing as a mistake, just more welding.

bushings

 

[Morrisman]

bushings

I wonder if phosphor bronze bushes would work, instead of wheel bearings, then I could run a bigger axle...... grease nipple each end etc.....

 

[roofman]

I wonder if phosphor bronze bushes would work, instead of wheel bearings, then I could run a bigger axle...... grease nipple each end etc.....

you rather than me..just make the bushes 2/12 mm each side to allow the 20mm spindle fit the 25mm hole.

 

[8ob]

That trike is a fair old unit, how much as a percentage would the front brake contribute in the overall scheme of things? I would have thought the jag rears would have done most of it

Bob

 

[Morrisman]

That trike is a fair old unit, how much as a percentage would the front brake contribute in the overall scheme of things? I would have thought the jag rears would have done most of it

Bob

More than a few people on trike groups have said that the front brakes don't really get a lot of use on a big trike, however, but MSVA dictates the braking effect required is based on the weight on the front wheel.

I'm putting as much weight as I can aftwards, radiator, fuel tank, battery etc, behind the axle, to keep the front end as (relatively) light as I can.

 

[PhillipM]

Maybe just try the stock disc and some decent high-torque pads first, I usually go with Ferodo ST's on the bikes, work well everywhere.

 

[Morrisman]

Maybe just try the stock disc and some decent high-torque pads first, I usually go with Ferodo ST's on the bikes, work well everywhere.

I don't have the disc, but ebay shows them being about 8" diameter......

 

[graffian]

Fronts are considerably larger than that.
I don't know anything about hyabusas but would guess the discs are ~320mm.

If your going for a one off you could try Spondon.

 

[minimutly]

I'm pondering how to get decent brakes on the front wheel of my trike project. I bought a Hayabusa rear wheel. which is good and meaty, takes a big tyre, unfortunately it has a single small disc. I've browsed around trying to find something far bigger with no luck, but today I noticed the brake discs on some Triumph in my mates bike shops were just flat sheet, cut to shape, ground flat. No offset, no carrier etc.

So, could I get one made simply enough, maybe laser cut from 6mm steel, or maybe stainless? Would it work? Would it need heat treating or anything else?

I can make my own floating caliper bracket, and have the disc as big a diameter as I need it.

View attachment 359026

View attachment 359027

When I had the same problem with my 750 trike, I used a vn 1500 (fully floating) front disk outer mated to a self made inner that mated up to the wheel bolt pcd. I made new stainless rivets, used the original sprung washers. The original calliper was re spaced using a lump of alli machined to fit.
Used a ball bearing in the press to swage the rivets. I have some pics somewhere.

 

[minimutly]

More than a few people on trike groups have said that the front brakes don't really get a lot of use on a big trike, however, but MSVA dictates the braking effect required is based on the weight on the front wheel.

I'm putting as much weight as I can aftwards, radiator, fuel tank, battery etc, behind the axle, to keep the front end as (relatively) light as I can.

Don’t listen, you absolutely need a front brake that works 100%.
Edit to add, you'll only be able to fit one disc, so it needs to be as big as poss.

 

[minimutly]

Here you go. The brakes on this (admittedly a very different 3 seater when I bought it) were absosolutly useless, more like slower downers. It needed all of them to be A+ to be safe at speed.

 

[minimutly]

Here you go
View attachment 359288

Old photo from a trike forum.

 

[Morrisman]

Don’t listen, you absolutely need a front brake that works 100%.
Edit to add, you'll only be able to fit one disc, so it needs to be as big as poss.

Ahem....

"but MSVA dictates the braking effect required is based on the weight on the front wheel"

 

[minimutly]

Ahem....

"but MSVA dictates the braking effect required is based on the weight on the front wheel"

And your front wheel will be lighter than the 750 motorbike engined trike pictured?
It’s your funeral