What to do with my Agattu

[tillson]

As you say, the front is relatively easy, but I'm not sure it's going to be possible to put a disk brake on the rear wheel.

 

[flecc]

The rear doesn't need much braking force, so a Shimano roller brake could be used there. This will not be affected by mud, water etc. This page gives you all the information you need on that, enabling you to check if your 7 speed hub has the necessary splines, I think it will have. Any cycle dealer should be able to get you one and it you require, fit it as well, but fitting is not a difficult job.

 

[Gringo]

Nice one, I'd never thought of Rollerbrakes.
I've spotted this for £20, I may need to engineer a bracket as it's for braze on mounts ( I have a lathe/mill )
Shimano Nexus Nexave Inter-M IM70 rear roller brake BR-IM70-R in Silver/Black | eBay
For the front, a disc brake for £10
Halfords | Clarks CMD8 Mechanical Front Disc Brake
I now need to find a disc ready wheel 622-19 ! Maybe this one, if it's wide enough ?
700c Rigida Q/R Alloy Disc Hub CNC Double Walled Black Front Wheel | eBay
Any thoughts on my choices ?
PS
I'm not fast, more of a plodder averaging 10 mph on the road ( unassisted ) out on the trails I'm even slower (I still managed 25 miles yesterday) so I don't need razor sharp braking, just something that dose the job better than mud caked rim brakes

 

[patpatbut]

If you really want a rear disc brake, You can get this adapter

http://singletrackworld.com/forum/topic/wtd-a2z-dm-uni-frame-disc-brake-adaptor-thingy

Lots of adjustment to fit but it works

Pat

 

[Gringo]

Cheers Pat.
good idea but the more I look into it the more individual parts are needed !
My 7spd hub doesn't have disc fittings, so would need another adaptor.
But a roller brake drops straight on, I've read some good reviews and if I order within two hours it's £19.99 back end sorted

 

[Gringo]

And this is why rim brake don't suit.
Yesterday and after digging the worst out with a stick
And covering a further 10 road miles

 

[jackhandy]

Beastly!

 

[flecc]

Yes, rim brakes on muddy going are hopeless, alwsy getting clogged up like that. That front wheel you listed should be ok, narrow rims can take surprisingly large section tyres without trouble.

Roller brakes are a little slow acting and seem weak after other types, but on the rear wheel those are good attributes, lessening the chances of a lock-up. They are popular on utility bikes which are mostly used at lower speeds. You probably don't need the cooling disc at the speeds and short braking periods you'll be experiencing off-road, so you could leave that off to make for even easier cleaning in that area.

 

[Gringo]

Cheers Flecc, the roller has been ordered and I'm now deliberating over the unseen internet wheel or £10 more for one from my local halfords Halfords | Front 700c Bike Wheel in Black

 

[flecc]

Not having transit/return risks makes the local option tempting for just £10 more, and the review comments are good.