Moulton TSR2

I'm just thinking aloud here.

With a normal wheel, the flywheel effect push the pedal round making it easier to says, go uphill.

whether a smaller wheel, the lack of flywheel mean you need to push more power through the pedal.

Has I got that right?

not when climbing no - the smaller wheel less rotational mass = easier to climb the hill
and this is a bigger deal.

the time you'd notice the smaller wheel is on the flat where the inertia of the bigger wheel might impact it. But there again it's a Moulton small wheel bike that holds the land speed record on the flat

IANAE (I am not an engineer) just remembering a talking with AM.

But there again it's a Moulton small wheel bike that holds the land speed record on the flat.

Isn't that really due to the rider than the bike?

Jim Glover was pretty handy at the time. But there were a lot of tests and a whole bunch of technical data generated about small wheels and figuring out the 'optimum' wheel size - specifically one chart illustrating 6% greater efficiency for the torque requirement on a level road. all fun - see Page 185 of 'Alex Moulton from Bristol to Bradford-on-Avon - a lifetime in engineering'.

I guess you could tell him the bike made no difference ;)

anyway TSR2 thread so pulling back to relevance

I've been riding a Dahon Mu Uno0 folder the last couple of weeks. I do prefer the S2C'd TSR2 for London. The Shimano coaster brake is softer than the S2C's initially but as you said in another thread I think it does bed in and your head does get around the gear change side after a few cross London rides.

[0] yeah I have one. Actually I have two, they might be for sale soon.

jesus, 12kg. Is the frame made of solid steel tubes?

You can adjust the modulation of the coaster hubs actually if you find the Shimano one felt a bit soft.

solid steel tubes?

...

Production TSR2 has been delivered - not using the prototype anymore :)

.. If you want a go (hah! yes Murtle) PM me and we'll sort a time/place etc.

(It'll be with me at Wests this Thursday till 1845 ish.)

Thread necro - just got my TSR-2. It requires absolute concentration to ride, though I think that'll reduce with time - you have to backpedal just enough to shift the hub gear, but not too much or you'll lock the back wheel up as I managed to do a couple of times yesterday (it's pretty sharp - enough to skid). I also nearly threw myself over the bars, because it does a sufficiently good job of feeling like it has big wheels, I forgot about the diddy wheelbase and pretty upright steering geometry and threw my torso forward as I pushed into the pedals. I won't do that again....

With a normal wheel, the flywheel effect push the pedal round making it easier to says, go uphill.?

I think any flywheel effect that a 1-1.5kg rear wheel has on a 70-90kg package will be very minimal indeed.

Nice to hear a short review of the TSR2, I'm pretty interested in one myself

There are moulton with fixed wheel transmission, even raced at velodome, obviously this isn't the TSR but it's running a fixed wheel transmission (not recommended though, something to do with the flywheel effect of the smaller wheel);

Lovely TSR on the Tweed Run made me think - is running fixed not recommended due to pedal strike potential (low BB height...)?

Pedal strike aren't a problem, site boss was able to explain it perfectly, not sure where his post is at ( there are more moulton topic here)

Can't wait for mine.

Flywheel effect... the dead spots are more pronounced due to reduced flywheel from the smaller wheels.

Upside to this, piece of piss going up hills.

Everyone at work were disgusted with me for selling my colnago and getting a moulton.

Yet every single one of them want to try it out.

Well, I've done it - in the process of ordering a TSR2 on Bike to Work scheme.

Also after a fixed rear wheel for it to ride in audaxes - any thoughts on the best place to have a 'ickle fixed rear wheel built up? Moulton themselves...?

Post it in here when you've got pics and some miles on it.

These are fascinating bikes.

Graeme, did you not read the topic about the fixed wheel + moulton?

Graeme, did you not read the topic about the fixed wheel + moulton?

That it doesn't work so well because of the low inerta of the wheel...? Yeah, but I reckon I can put up with that occassionally - I'll only be riding it fixed for a few 100k audaxes to get FWC points. TBH fixed doesn't really work too well when you live on the edge of the Peak District, hence why I'm after a kick-shift - I reckon I'd be riding it that way 90% of the time.

I asked the nice man at Moulton about fixifying it and rather than the "no" I expected, he said it's possible & it will work but they don't wholeheartly recommend it for the reasons above.

I think any 'flywheel' effect is more from the forward motion of the cycle rather than the weight of the wheel - i.e. forward motion drives the rear wheel which drives the chain which drives the pedals. I don't think the weight of the wheel would make any noticeable difference (since it weighs sub 2kg).

Not a dig at you Graeme, just thinking aloud!

I've also got a kickshift wheel coming for my bike - its arriving monday and I'm like a kid on christmas eve

I tried fixing a Dahon Presto (no speed bike, I know) but it didn't work out very well. The stays prevented a big enough gear ratio. A problem more applicable to your situation was that I had to go with a 13 tooth cog and could never get the drivetrain to shut-up, no matter the spacers and different combinations of chains and rings. Smaller rings just seem to be noisier/clunkier. I'm a wanna-be aesthete, so sue me.

I've also got a kickshift wheel coming for my bike - its arriving monday and I'm like a kid on christmas eve[/QUOTE]
I've got one (SA) on a townie bike, works petty good, though the brake is very touchy/grabby and I would not recommend riding it regularly in -30 temps.

^ rarely gets that cold in Bournemouth anyway. I've heard mixed things about the modularity of the hub; I hope mine works out well.

Yeah, I figured. My sister lives in Bournemouth, beautiful place.
I'm in Winnipeg.
woof

Sorry, back to thread.

When it come to kickshift, I always recommended the standalone kickshift rather than the combo with coaster brake.

when engaging the coaster brake, you engaged the kickshift, which can be annoying at time, take a while to get used to (and timed your pedal stroke).

How do you lock a Moulton? If you just locked the rear, someone could just walk off with the front, and vice versa...?