[XAP]Bob wrote: Don't forget to halve the difference, since you always temperature check your setup when initialising it
actually I did think of that... I supposed that reasonable min and max temps when riding might be (say) -10C and +40C. Thus setup at 15-20C would allow for about 25C variation.
Oddly enough CFRP can have unusually low CTE values, so cable adjustment on CRFP frames with cable runs between 'braze-ons' might vary in the reverse direction, but to a similar extent....
JohnW wrote: Are those bar-end levers friction or indexed?
reohn2 wrote:
JohnW wrote: Are those bar-end levers friction or indexed?
Both
Quite correct "reohn2". They are all Shimano Ultegra 7-8 speed used on a six speed freewheel. I have some vintage Campagnolo ones to fit on one of the bikes but not got round to it yet.
1942alexander wrote:Quite correct "reohn2". They are all Shimano Ultegra 7-8 speed used on a six speed freewheel. I have some vintage Campagnolo ones to fit on one of the bikes but not got round to it yet.
They're OK but in the 'wrong' place :-
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"All we are not stares back at what we are"
W H Auden
RickH wrote:I don't have any Di2 stuff I'm just not inherently anti the technology and wondering why the line gets drawn at a particular point!
Rick.
I agree: there's no logical point at which to draw the line. There is a line to be drawn however - you could call it simplicity, or non-electronic or traditional or easy-to-find-parts-for or whatever. It's just that it will be full of holes and inconsistencies. But in principle, you could be looking for say a reliable bike with simple, familiar parts that you know how to fix: you could make a series of choices around that which would make complete sense even if they say excluded electronic shifting but included LEDs.
Otherwise it makes no sense to draw a line anywhere - and I think that's just as non-sensical. The bike is a sophisticated piece of engineering (I couldn't make one) but it is still possible to find a balance for it in today's society.
When the pestilence strikes from the East, go far and breathe the cold air deeply. Ignore the sage, stay not indoors. Ho Ri Zon 12th Century Chinese philosopher
for touring there is a point to draw the line; that is
1) when you can't strip/fix the thing by the side of the road, and
2) you can't walk into any bike shop and buy something to jury-rig to carry on with.
So STIs arguably break the first rule but there's always a cable operated lever that can be installed if necessary.
With Di2 you would be a bit stuffed by comparison. Already there are framesets which are primarily designed for Di2 and it is only a matter of time before they either won't accept cable-operated stuff or indeed that the manufacturers don't make cable operated stuff of the required quality etc....
So I think that, as a scheme, outside of racing and one or two other niches, Di2 etc is probably to be resisted if nothing else because of the effect it will have on the availability and sustainability of 'practical bicycles'.
Remember that this not shimano's first go-around with electric shifting; those with long memories will recall Shimano's Nexus 4 automatic shift system, which was never popular and pretty much sunk without trace. Similarly the track record of electronics at the heart of bicycles is not an altogether happy one; you don't need to look far to find cheap used electric bikes, mostly with faults that cannot be fixed in any rational or cost-effective way.
In the meantime even within racing, - despite sponsorship pressures- it seems hard to find pro cyclists who have come out and said (with conviction and good reason) that 'Di2 really helped me win that race' whereas there have been several notable examples of riders whose chances of victory were comprehensively destroyed by failings in this kind of system.
To draw a parallel, supposing that 'electric running shoes' were invented; they'd have to be pretty amazing before they would be worth having over boring old-fashioned ones, and no-one would bother using them in racing unless they actually made you a load faster somehow.
Interesting that Mark Beaumont didn't seem too concerned that his frame couldnt be welded half way accross Africa, his disk brakes didn't explode and his sti shifters didn't fall apart in 6000 miles of flat out riding. Maybe things don't fail as often as armchair cyclists woukd like to think.
Dave W wrote:So why do a lot of tdf riders use it?
Because they're paid to,like they're paid to have SKY written all over them,it's only the likes of Wiggo,etc who have the power to refuse if they don't want it. If there are failures which cost important race wins it'll be dropped like a stone,ie;two important SKY/Tinkoff Saxo/BMC/Astana domestiques get dropped due to Di2/campag equivalent failure at a crucial time on a mountain top finish,in the next two weeks,costing serious time to their team leader(s) it'll disappear without trace from that team.
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"All we are not stares back at what we are"
W H Auden
I don't use drugs but that doesn't mean I'm an armchair cyclist or a bit behind the times. Neither drugs nor electric shifting are particularly useful for cycling IMV and AFAIK they're both expensive.
When the pestilence strikes from the East, go far and breathe the cold air deeply. Ignore the sage, stay not indoors. Ho Ri Zon 12th Century Chinese philosopher
:-
