General Disc Radness (formerly disc wheel valuation thread)

Two bloody track discs that I have been bidding on ebay have had their auctions ended early. Anyone on here got anything reasonable for around £300 (and are in the Bristol area!).

I need some forum expertise on a mystery three spoke front wheel. The seller says he doesn't know the brand and that he went to a bike shop to ask whether it was made out of carbon which they affirmed. Now I'm not sure in how far the seller and the bike shop are experts on carbon wheels but judging from the shape and the position of the valve hole, it looks very similar to a 'trispoke' (the one with the white and red logo) which afaik (please correct me if I'm wrong) is not made out of carbon fibre but thermoplastic. I read that the 'trispoke' front weighs 1050g, is a proper carbon threespoke like spengle, specialized etc. considerably lighter? I attached some of the seller's pics, maybe one of you guys has an idea:

6 Attachments

Looks like a Trispoke from the profile valve placement and hub.

That was my initial guess as well. What are they made of exactly? Isn't it some kind of composite/plastic? I had one in 650c which came with a lo pro but the bonding between the hub and the main body was loosening so I sold it as damaged to someone who said he would repair it. Given that the first one I had was fucked, are they generally problematic? What would be a fair price for the one above? thanks in advance!

p.s. if you compare the last picture I posted with yours, it seems that the spokes in my picture have more of a teardrop shape whereas the one you posted looks more symmetrical.

Looks the same to me plus wheel I posted is 650 so slight profile difrences

If it's not that maybe a pos juna, is it tubular?

Could be that the one offered for sale is a 700c rear converted to front. And you're probably right about the shape differences coming down to the difference 650/700. It's for clinchers, the tri spoke I had was clincher too. I asked the seller if he could weigh it. If it's around 1kg, i guess I take it for 100€ shipped. If it weighs considerably more, I'll drop out. That is of course if you're not making me a better offer on one of your many spoks which I'm sure your desperately trying to get rid of ;) jk

pos juna

?

what's so bad about juna?

@Sig_Arlecchino Im not really shopping at the moment, and never desperate to sell ha, but if its too heavy for you dibs on the link. still need a clincher spoke for my wifes bike.

nothing, just they are a bare carbon wheel and all of the painted ones I have seen where beaten to absolute crap

pos juna

?

what's so bad about juna?

'Possibly' not 'Piece of Shit' .

Fair enough. I still need to find a way to convert my rear to a front. It's no good to me as-is. I don't mind the bare carbon though, dated as it is...

Pm me pics of the hub I'll take a look

The tester said wah-wah at me on another thread, but I have a feeling it's still possible with help... Will get photos when I rescue it from the storage cupboard.

Ah just searched and found the thread. yeah cassette body wheels are not convertible, sorry

Argh so I have just got an Ambrosio track disc but the pump adaptor I had already (from the UK TT Facebook group guy) doesn't fit. I definitely had a crack pipe style one at some point but I can't find it now so I must have sold it with the last disc.

Does anyone in East London have a spare? Or know of somewhere that sells one that I could get today?

I found a Zipp valve adaptor which seems to be the shallowest possible.

I'm still having trouble getting the adaptor off without losing all the air again, there's just no room to play with in the valve hole.

The tyre's not taped on yet so I can lift tje tyre off to get the adaptor off, but obviously that's not going to work once I've taped it.

Any suggestions from previous Ambrosio owners?

Here it is:

1 Attachment

Ah ok, I see what you mean. It's the same on my obscure Russian disc. I've simply bent the valve pin a little. My Topeak valve adapter is a fair bit smaller than that, too.

I ended up buying a 'proper' front disc, so have gone back to my original plan of converting an old HED to a rear track disc.

I bought one of those SPNK adaptors on (from ebay) but the only way I can get the correct chainline (with the wheel sitting centrally) is to flip the sprocket. I cannot see any reason why I shouldn't do this but thought I would see if anyone else on here thinks otherwise.

As a side note, I wanted one of the old style HED decals to cover a blemish on the disc but could not find one anywhere online. I have drawn the artwork, if anyone else wants one let me know and I'll email it to you:

They used to sell adapters with different chainline options, not sure now

They stopped making the road chainline version, due to a lack of demand.

They said mine was track but if I screw the sprocket on normally the wheel is sat off centre.

If yours is like the picture from @Pifko you'll have had the same problem I did with my one I put together. Stupidly tight to get onto the valve.

Trick was to sand off a few mm of the presta-schrader adapter part, so it sits flush with the 90º piece. I went to (a well-known shoe repair chain) and used the rough band on the shoe finisher to sand mine down probably 5mm so it screws in well. Much better fit on the wheels now.

Not perfect, but it works now. Check your adapter, maybe if you even hacksaw the valve adapter you can make the necessary modification.

1 Attachment

i use the BBB crack pipe on mine and it just about fits, just have to be careful pulling it off as it tends to whack the valve hole opening.