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Any experience with 650C wheels ?(10 posts)

Any experience with 650C wheels ?PatC
Oct 19, 2002 11:00 AM
I'm looking for 650C wheels but European wheelmakers can't be bothered with these.
So I'm trying to find the right wheels to buy from American
wheelmakers but it's rather tricky to know which is the best pick !
I've heard about Hed's Jet 4O and Cane Creek's Aeroheads... but don't know much about the sort of road riding they're mostly suited for.
So thank you for sharing your experience...
For what type of riding? TT/Tri? All around? crit/race? (nm)wilsonc
Oct 19, 2002 12:15 PM
For what type of riding? TT/Tri? All around? crit/race? (nm)Spunout
Oct 19, 2002 12:53 PM
I think if you are 5 feet tall, they may work for your framesize.

Otherwise, Aero and resistance shows that there is no benifit from 650cc wheels. The ride is rougher. Any aero benefits are lost on a higher head-tube. checkout for more details.
650 = Ride rougher?!wilsonc
Oct 20, 2002 1:56 PM
how can the ride be rougher? I dont buy it, but even if it is, the amount of increased "roughness" is probably so small as to be negligable. There would be many factors in a wheel that would affect ride quality to a much much much higher amount, like air pressure, tire width, tire selection, spoke count, rim profile, etc.

I agree that 650 wheels are slightly less aerodynamic than 700, but again to a very small degree. This is completely offset by the dramatic increase in aerodynamics by lowering the bars, allowing the rider to achieve a much lower position on the front end.

650 wheels are used in numerous TT/Tri bikes in order to get the bars low enough. Typically, frame sizes up to 54cm use 650 wheels (which generally equate to people up to ~5'10" tall).

Of course, for road bikes, generally only in frames <48cm use 650 wheels, which probably equate to people ~5' or so, so you are probably right on that account.

For what type of riding? TT/Tri? All around? crit/race? (nm)PatC
Oct 20, 2002 5:29 AM
Well I already have a Bontrager wheelset (but damaged the front wheel when crashing during a race). I really appreciate them and uses them as all around wheels.
But I fancy having wheels meant for climbing passes(and of course going downhill then !) on my Ultrafocco Willier.
Sorry, made a mess of my previous reply..but have a look at it !PatC
Oct 20, 2002 5:41 AM
re: your frame is designed for 650C right?Akirasho
Oct 19, 2002 2:52 PM
... just to make sure... wheel size is fundamentally a function of the specific frame. Without heavy modification, you can't use one size on a frame designed for another.

I've experience with both HED and ZIPP, both great products (HED is cheaper but heavier). Currently runnning a set of 650C ZIPP 404 clinchers... nice wheelz.

We abide.

Remain In Light.

Be the bike.
Yes, it is.....PatC
Oct 20, 2002 5:37 AM
....since it has been especially designed for 650c wheels by Willier - actually it was their first try at it, and I must say the Italian manufacturer has made a great job out of it !

I had heard of Zipp wheels - indeed they are quite expensive, far too much for me !

Thanks for the photos...what a seat post you have got..I had never seen the like of it ! Here, in Europe, we are more 'traditional', I think...
... both bikes sport proprietary seat posts...Akirasho
Oct 20, 2002 3:26 PM
... I've never seen a Willier in person (just one bare frame), but have heard good things about them.

ZIPP's can be expensive... but they also represent (hopefully) a long term investment. Unless you go for stoopid light, I'm sure a ZIPP wheelset will give you years of service (ZIPP and HED both have decent customer service and maintenance support). As another post showed, there are other alternatives to boutique 650C (almost picked up a set of the CXP's... might do it anyway).

Both frames employ a true aero seat tube, therefore, a round post wouldn't work.

... view from the rear...

Cervelo simply uses a proprietary post that fits their tube... GT used a bit more elaborate design. The post is integrated with an exterior fairing and an interior fixing rod. Indeed, GT provided a rubber boot to make up any gap tween the frame post and the seat post (mine is a near perfect fit as is).

The good is... you maintain the aerodynamic properties of the frame (true aerodynamics require about a 4:1 thickness to chord ratio... something that many "aero" seat tubes lack). The bad is... you're stuck with the proprietary system.

GT no longer makes this frame so any replacement parts will have to be scrounged (I've seen the frame and post components at swap neets) or fabricated from scratch. Cervelo, however, has redesigned their post... and improved on the original (it's head is reversable, changing the effective seat tube angle on bikes so equipped). Since you'll be seeing Cervelo under CSC Tiscali next season, they should get a good real (Pro) world testing.

We abide.

Remain In Light.

Be the bike. or thebicyclehub.netzmarke
Oct 19, 2002 5:22 PM
These seem like good deals...

Mavic CXP33/Ultegra 650C Wheelset
Reg $299.99
now $169.95

The Bicycle Hub
they sell direct or via eBay