Cycling UK Forum

What cranks?

Since this set-up is new, what makes you believe a RD-6700-A GS will cope with a 34T large sprocket on the cassette? That is well beyond the official capacity, and among other things that leads to the guide pulley being too far from the smaller sprockets when the B-tension is adjusted to clear the l...

I gave a link to the SJS Cycles part for FC-4700, FC-5800, and FC-6800. Which cranks do you have that need a new ring?

I see. Well, I was glad of that wheel-builder’s dozen this time. The right spokes would have been a tad too long if the ERD had been 593 mm as I expected and not 594.5 mm. Lesson learned again: do your own measurements! Especially if spokes are sold in 2 mm increments. On another note, 11-speed disc...

how's it going, Samuel? Not too bad, thanks for asking. I received the rear 32-hole Archetype rim and measured its ERD at 594.5 mm to the nearest half millimetre. This rim had an outer diameter of 634–635 mm (compared to 633 mm and perfectly round for the 28-hole front). But the drop to the spoke h...

On a tangent, Mavic are meant to be launching some new stuff: https://bikerumor.com/2019/03/15/mavic-adds-carbon-rims-for-custom-wheels-hubs-coming-prototype-gravel-wheels/ Interesting carbon rims with polished ramps up to the tubeless seats (see first photo in the article body). Mind you, not for ...

Shimano merely calls it a ‘ring’. Look up the exploded view for your cranks on si.shimano.com and read off the part number, then Google that. For example, for your FC-5800 cranks (PDF) it is part number Y1F316000, available here.

I have taken police motorcycle and driving courses over the years and we were told "you don't need to know the model and year of the vehicle behind, let alone the colour of the driver's eyes. All you need is to see there is a vehicle and to assess closing speed". For this reason I often t...

Also your neck may rotate one way more than the other. Often when abroad cycling on the right, I still look over my right shoulder as I get a better view as I can look round further that way, when common sense would say to look over my left shoulder. My neck rotates more to the left or feels easier...

Is the chain stay bridge also usually M5 when present and drilled to take a mudguard?

Regarding an earlier comment on computers.. I haven't heard of anyone having accidents caused by being distracted by their computer,but I can see how it could happen quite easily.. I think they cause plenty of accidents but no-one admits it, just like mobile phones cause many car crashes (especiall...

Mavic squandered much good will and reputation in recent years. It managed to simultaneously annoy its customers of traditional rims (by discontinuing good products, no longer improving those products, and allowing quality to drop) and arrive late with the new hotness like wide road rims, all-carbon...

FWIW building with archetypes has one thing that might catch you out; moreso than with many other rims, the spoke tension is lost when the tyre is inflated. You should err on the side of high spoke tension when building the wheels; if the tension is near the minimum acceptable value when the wheel ...

Re stress-relief, I'd suggest that you squeeze the spoke crossings towards one another, i.e. by using a movement that is paralell to the axle. I’ll try that. BTW what rims are you building with? I already built the front with a 28-hole H PLUS SON Archetype that I measured the ERD of as reported her...

I can muddle along but wouldn’t mind a few pointers from those with more experience of aero spokes. First, do these lightweight spokes stretch appreciably farther than regular ones? I ask because I’ve ended up with left spokes ~2 mm shorter than the calculated value for a rear wheel (by relying on E...