Current Projects chat and miscellany

Cool forks, what does the writing say on the fork leg? ... club? I have a similar fork, a regular Club and I’m loving it ;)

Millenium Club. They seem pretty good actually, I thought they'd be quite flexy but nothing I really notice.

Spent yesterday making a pig of a bike to have at my parents, just something to ride. Ran out of parts, patience and tools before I finished.
Some suspect marks on the carbon, makes me a little nervy.

Some suspect marks on the carbon, makes me a little nervy.

The joy of retro carbon bikes ;)

Cavallo genius light project

That's lovely. A bit more understated than my my Cavallo Marino.

Have a Columbus Thron the OS DT is cool fresh but this Genius is light !!! 1400g

Are you going weenie on this one?

It's a 54 long so it's my F*** sise and with this grupo
I will make a steel bike as light as possible to make me a new daily
Yes Pawlus

and will build the mapei 7700 or 7800 DA

Is the pull ratio the same on a SRAM X0 9-speed MTB derailleur and a Dura Ace 9-speed road (downtube) shifter? I can’t seem to get that setup to run through the full range of gears. It actually only pulls across 7 of them and none of the indexing lines up.

Dropper friendly saddlebag rack vers.1

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SRAM 9-speed is probably 1:1 ratio so no, it won't work. I got friction + Exact Actuation to work though.

Is the pull ratio the same on a SRAM X0 9-speed MTB derailleur and a Dura Ace 9-speed road

No.

As you have discovered for yourself 😀

Surely the wheel will hit that??

I reckon so too. It was fine for a spin around the carpark but I'd say it will rub on proper compression.

I made it with 6mm stainless tube and I think I might use 6mm stainless rod for vers.2 as it's just a bit too springy to make it much longer and higher as it is.

Pleases with the result so far though.

@frankenbike @mdcc_tester bums, that’s annoying. Thought I’d check in case I’d done something wrong. What about a 9-speed medium cage Ultegra? I guess my next question is whether a medium cage derailleur can take a 40-tooth total difference from top to bottom [edit: sorry, it needs ~30 tooth total capacity], with an 11-30 cassette on the back (11-34 with the 34 taken off)

What about a 9-speed medium cage Ultegra?

It will work with the lever, but you'll be over the limit of both total capacity and largest sprocket.

11-34 with the 34 taken off

If you're thinking of thinking of cutting the 34 off a 10-speed, you'll be disappointed again, the spacing is different and 9-speed lever/RD combo won't index properly.

Ultegra has the right ratios but as Tester says won't clear a big cassette. Your best bet would be a £15 9-speed Deore derailleur I would think. Several people on here use that with up to 11-40 even without a RoadLink. But you can buy an eBay RoadLink for £1 if you need it.

If you Google "turkey vulture gearing" you'll find an article that describes long cage 9-speed MTB derailleurs with front mechs and big cassettes. (website is dead, here is google cache version.) Those guys run 11-40 with 24/44 for a total of ~49 links wrapped by the derailleur. And someone in the Monstour or retro MTB thread had a Deore LX with 11-40, think it was a Marin with 3" tyres? (it was - here)

Edit: ah just realised I confused your total capacity for biggest sprocket. Tired today. But basically what I'm saying is get a long cage 9-speed MTB derailleur, they're cheap, sturdy, long enough to wrap all that chain and have compatible pull ratio

Edit: Also, with Dura-Ace DT shifters you can use them friction if the indexing is wrong. If you need to get something working ASAP just use your Ultegra derailleur, Dura-Ace shifters in friction mode, and whatever 8/9/10-speed cassette you have around that the derailleur clears.

Some bungy cord around the pack and the saddle rails maybe? Be ugly but add support both with post up and post down. Even a drawstring style thing to tighten the bungee with post down?

It’s 8 gears off a 9-speed cassette on a 7-speed Hyperglide freehub switched onto my 6-speed Uniglide hub. It's all a direct swap, gives me 8 gears in the same space as the original 6 and fits in the 126mm rear spacing. Indexing is still 9-speed spacing, so I’ll set the derailleur limit screws so it can only shift across the 8 gears. Hence using the 9-speed shifter and using dt because I want to keep the classic look. The Ultegra 6600 is polished alloy and has the look I wanted, so it’s a shame it won’t work.

Reading around I can see now what the problem is with the older 6600 - it’s the clearance over the first jockey wheel rather than the cage size.

article that describes long cage 9-speed MTB derailleurs with front mechs and big cassettes

That's great stuff. You can probably tell I'm not well up on gear compatibility, especially mtb stuff, so cheers for that!

I refer to this a lot as well:

http://blog.artscyclery.com/science-behind-the-magic/science-behind-the-magic-drivetrain-compatibility/

basically Shimano 7-9 MTB and 7-10 road are all compatible with each other, and with SRAM you just match parts together according to whether it's "Exact Actuation" or "1:1 Actuation". I don't mess with Shimano 10 MTB, 11 road/MTB, or Campag

like I said though, I have got Exact Actuation and Shimano-compatible friction shifters to work. As you can see in those tables Shimano pull ratio is 1.7 and Exact Actuation derailleur shift ratio is 1.3 compared to 1:1 Actuation ratio of 1.1. So you can see I don't need to pull quite as much cable as you do to get through the whole cassette. Which'll be why mine works and yours doesn't.

Currently building up this Ciocc Genius frameset. (Dressed with Chorus 9)

Thought it was my opportunity to use the Grammo arte, but found it a bit beefy, opinions ? (Handlebar will be Soma Highway 1)

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That stem... Cost a bomb? ;)

I remember seeing a video of Marco Pantani riding a Carrera that had a stem like that and thinking it/he was the coolest.