Great big Singlespeed thread!

[coreygun]

Nice to get into your thoughts and various travails of getting the tension right. I did wonder, since some eccentricity woudl I assume help with the smaller loop…

With a head full of virus…and brain working like a clunker…I indeed had thoughts of ‘how do you find the pivot point in a virtual pivot context?’ - I should immediately have realised that on single pivots, and with helpfully higher pivots away from inference with chainrings, the pivot point is er…stunningly obvious.…apologies

….and the forward facing caliper mounting….well……reason one is to stop interference with mudguard stays. Which is sensible…since it can involve a hell of a lot of spacers and long bolts on SKS mudguards, when the caliper is in the conventional rear-and-left position on forks. Reason two {from Cotic) is that ‘it does not produce a wheel ejection force’ - which does make sense in terms of dynamics … but which of course they obviated on the Mk2 by having closed 10mm bolt thru dropouts...

I have in the past worked out where the VPP is for other reasons, this pic shows how.

I've never heard of a wheel coming out of a fork due to the braking force, but I do know that brake mounts are put behind the thing they're attached to (mainly on the frame) to add strength in the direction the brake caliper is being forced (which is why frames also have braces between the seat and chain stays), so with the caliper mounted at the front of the fork, all that's holding the caliper there is the two 5mm bits of metal around the bolts.

 

[2manyoranges]

I have in the past worked out where the VPP is for other reasons, this pic shows how.

I've never heard of a wheel coming out of a fork due to the braking force, but I do know that brake mounts are put behind the thing they're attached to (mainly on the frame) to add strength in the direction the brake caliper is being forced (which is why frames also have braces between the seat and chain stays), so with the caliper mounted at the front of the fork, all that's holding the caliper there is the two 5mm bits of metal around the bolts.

Yep. That’s my thinking too. Gulp.

 

[klunkrider]

I've never heard of a wheel coming out of a fork due to the braking force,

You’ve never paired a crappy open cam qr skewer with a moderately powerful brake? Have you even lived?!

I’ve never pulled a wheel right out a fork but definitely caused it to shift within the dropouts. Lawyer lips did their job.

The jackshaft stuff is awesome. Way beyond where I am in terms of engineering.

 

[coreygun]

You’ve never paired a crappy open cam qr skewer with a moderately powerful brake? Have you even lived?!

I haven't had a QR front since my Spooky Metalhead in 2000, and that didn't even have a front brake!

 

[madjh]

For a monet I thought this was the Fixie corner, but I start to read about brakes ... er nope.

 

[Guinessisgoodforyou]

For a monet I thought this was the Fixie corner, but I star to read about brakes and ...nope.

I've ridden fixed off and on for 40+ years, always with at least a front brake. Sometimes with two.

 

[madjh]

My new bicycle has the two options (fabric original). But the speed is never more than 35kph

I miss the Mongoose Maurice, it was a good Fixie or single speed. At least the freedom thick slick was thought enough for that city rides were sometimes you go a bit fast downstairs. It doesn´t roll too fast but it was bullet proof.

The first day with brakes and not fixie. The geometry was very good, very fun to ride (single tracks, city, stairs ...). The size was wrong.

 

[Splatter Paint]

Can you recommend some sprockets to go on to a normal freehub, please? Nothing fancy, it is for a winter bike.

 

[MattiThundrrr]

I used a kit from DMR to convert mine, tensioner leaves much to be desired, but the sprocket seems good enough

 

[coreygun]

Can you recommend some sprockets to go on to a normal freehub, please? Nothing fancy, it is for a winter bike.

Any will do really, there's not much difference in a pressed piece of steel. But, a wide base is good to prevent gouging in the freehub, Halo make the Fat Foot, and Gusset make the Double Six...