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lightweight steel(12 posts)

lightweight steelstinkbug
Jun 10, 2003 9:45 PM
I am interested in hearing from people who have had experiences with some of the new ultralight steel, namely Ultra Foco, Dedaccia EOM 16.5, and True Temper OX Platinum. I am considering a custom steel frame (possibly a Foco front triangle and an Ultra Foco rear). I was wondering if the lighter tubes provide more comfort (i.e. flex), all other things being equal.
re: lightweight steelryder1
Jun 11, 2003 3:59 AM
I know this does'nt answer your question but, I was in a new shop last weekend and the owner had a brand new Independant Fabrication Steel Planet Cross. I could'nt believe how light this bike felt. It was only missing shifters, cable, and chain. Scale weight was just over 16lbs. I was pretty impressed. Paint was beautifull too in a patriotic white with faded red and blue stars and stickers.
re: lightweight steelBikinCO
Jun 11, 2003 4:06 AM
I have been riding an IF Crown Jewel for a little over 2 years. It is 853 and Ultra Foco. The ride is outstanding and the bike weighs in under 18 pounds. Its a 55 cm with Campy Daytona 10 speed, Ksyriums SSL's, and some other light stuff. The bike is plenty stiff for my 200 pounds.
re: lightweight steelRusty Coggs
Jun 11, 2003 4:51 AM
You are oversimplifying. The stronger alloys are often made in larger diameter,therefore less flex. Typically old school standard diameter stuff like columbus SL will be both heavier and wimpier. Pegoretti uses eom16.5 in about 3 different diameters to get differign stiffness results. My Strong Foco frame is large diameter, stiff and light,but still rides better than A cdale caad4 which is only a bit lighter.
re: Also,Rusty Coggs
Jun 11, 2003 4:56 AM
Steel alloys are equally stiff. In a bike frame,diameter and tubing thickness as well as shaping in critical areas are used to modify ride character.
Look AC353...merckx56
Jun 11, 2003 5:02 AM
I have a Look AC 353 Foco frame with a 1-1/8" HSC3 fork.
Built with Dura-Ace and K's, it goes under 18 pounds...for a 57! I had a Merckx Corsa 0.1 with a similar build kit previous to this bike. It weighed right at 20! The Merckx was not as stiff as the Look. The Look's ride falls nicely between lugged steel and aluminum. The tubing is VERY thin though. I tend to wonder how long it will be before it cracks and loses it's stiffness. Overall though, I love the bike!
Look AC353...brian n
Jun 11, 2003 6:05 AM
the steel won't change its properties, this is a myth.

you may crack it, but steel frames don't "soften," most likely this is a result of the wheels getting older and losing tension minutely etc....

take it from a metallurgist (who prefers steel frames),
brian

ps- this frame looks really cool. i don't like the carbon looks with their really chunky lugwork, but this looks really nice.
Go oversizeMR_GRUMPY
Jun 11, 2003 5:19 AM
If you go with lugs, you probably will be limited to 1 1/8 top and downtubes. If you go with a tig welded frame, you can get 1 1/4 top and downtubes, or larger.
If you are a heavier rider, the oversize tubes will limit frame flex. If you are pretty light, you could go with standard size tubes that are thinner and lighter.
Go oversizeSpiderman
Jun 11, 2003 6:46 AM
serotta's have 1 3/8 st and dt, they have proprietary lugs for the colorado concept tubeset. Outstanding steal rides, lugged especially.
Tube sizesNessism
Jun 11, 2003 6:50 AM
Standard steel tubing = 1" top tube, 1-1/8" down and seat tube, 14 mm seat stays, 22.2 mm round-oval-round chain stays

Oversize steel tubing = 1-1/8 top and seat tube, 1-1/4" down tube, 14-17 mm seat stays, 22.2 mm or 24 mm ovalized chain stays.

The origional Foco tubing uses the standard Oversize dimensions listed above. Columbus also made a MTB version of Foco and some builders mix and match with the road version to taylor the ride.

UltraFoco is a super oversize tubeset which is even thinner than regular Foco and uses ovalized "Megatube" shapes. The rear stays are the same for both Foco and UltraFoco.

Regarding the origional question, a frame built using the origional road Foco tubeset will be quite light but fairly flexable. Maybe not the best configuration for a heavy weight racer but should be nice for longer, slower paced rides.

Good luck.

Ed
thanks - anybody ride a Vanilla?stinkbug
Jun 11, 2003 8:20 AM
Thanks for all the replies, I guess I should have been more specific. I am coming from a Ti frame, so I am most interested in matching the rear end compliance and comfort of the Ti frame with the new steel bike. I weigh 155 pounds and am more of a spinner, not much of a sprinter, so a little flex in the rear is what I would prefer. The only high end steel bike I test rode was way too stiff for me, but I realize that this could be more a matter of design than tubing specs. I guess I just have to find a builder that knows what he/she is doing, right now I am leaning towards a Vanilla.
re: lightweight steeldesmo
Jun 11, 2003 9:01 AM
Full Foco tubeset, 3lb. frame, 17 lb. bike: 54cm with 32h Reflex tubular rims and Conti Sprinters. Rides like steel, very comfortable, and no flex, at least compared to anything else I've owned (Columbus SL, Reynolds 531, etc.). May be due in part to the really short chain stays but I find this bike to be rock solid for sprinting, and big gear climbing.