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Stupid question: don't all tt or tri events require a freewheel and two brakes?

Ah ah! :D

See it as a 30 quid experiment!

I want to give more rake to my bike by trying a smaller front wheel on the cheap.

I've been looking out for rims and tyres prices and I've come out with the best solution to choose as a 590 rim (26 x 1 3/8 or 650a)

The brake height is not a problem but I was wondering if I could fit available 23/25 590 width tyres on a rim that is built to accommodate 37 mm ones

I've been reading Sheldon but couldn't find any info on such rims' inner width, although I suspect it should be about 20 mm

And wondered if I could use 700c inner tubes in it by any chance given that it's impossible to find 23/25 590 tubes

Any help appreciated

Keep your boner to yourself.
.

In NYC studying for the past year and 6 months. This forum is harder to keep up with(for me) when much of it is irrelevant to my life- but I still cruise by now and then.

Well, thanks for that irrelevant post! ;)

this isn't THAT bad. just an inexpensive bike with a bad seat set up. bars are set up for getting on that ipad action.

That's my actual bike from which I'm posting right now in a shower of sweat

And the saddle is in "tri" position ;)

And it is THAT bad!

For the sleek design:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=111259663376&ssPageName=ADME:B:SS:GB:1120

.

http://www.stringbike.com/bikes/bikes-cross/

Why has nobody thought of that before? ;)

They could, but it's easier to vary the transmission ratio between crankshaft and driving wheel to achieve the same effect.

I believe some Ordinaries were fitted with adjustable cranks to provide different gain ratio without changing the wheel size, long cranks (low gain) for leisure and short ones (high gain) for racing.

What about some kind of spring arms that get longer during the bottom half cycle of pedalling when pushing on them, but stay a fixed lenght when not pushing

That could make uphills a lot easier in conjunction with clip on pedals and would avoid spinning too much on downhills, when not pushing

Interesting but I guess you can get the same kind of results with the elliptic crank alone.

And you don't have to look such a knob.

Can't someone invent crank arms that shorten at high rpm?

easy.

Is that saddle setback even legal in tris? Looks more than 5 cm to me

Maybe that's how carpenters go to work in Greece, or public debt has really hit hard.

Why are scoblebricks on the floor?

Because art!

Beat this!

Don't know if there's a similar thread around but otherwise, any strong opinions?

I used to race bikes but now getting more and more into bullhorns. They're more aero themselves and I think work better in conjunction with clip on aero bars. I miss the fantastic grip drops give you for sprinting but you can't have it all right?

Btw, I'd like to apologise for my spelling of aluminium. I'm italian ;)

Parts of me still want a completely aluminium bike

Not too much I hope. Fact is that I was all for alluminium, but since my bar ends shattered under the weight and I had to replace my alluminium seat clamp bolt after one week, I prefer being careful. I used to hate that my fork is steel but that might be not too bad afterall and my alluminium crankring just doesn't seem as sturdy as a steel one. So was wondering about those two components too. Having the choice, didn't want to make mistakes but I'll probably go alluminium for both. They basically become part of the frame once installed and I guess should be the same material.

I have the sizes and types. Semi integrated hs and cartridge bb, both vp components. Just that both have two versions, a cheaper steel and more expensive alluminium. My frame is alluminium with fork steel. Weight difference might be not that big, but in terms of durability and compatibility I was wondering if there was any advise. Cheers.

Tnx, I have to decide between aluminium or steel bb and headset for my aluminium fixed gear and don't know if it's worth spending twice as much for the formers

Are alluminium BB and headset preferable on an aluminium frame?

They are lighter but are they better also in terms of termhal expansion and to avoid loosing the Frame's BB thread?

Does an alluminium frame need an alluminium BB?

http://www.ebay.co.uk/itm/Cinelli-Mash-Bolt-2013-Track-Fixie-/161183214780

Hope I'm not boring you with these finds. Let me know