AASHTA >From Sheldon Brown's glossary
Larger in diameter than the traditional sizes. This term is commonly used forheadsets and frame tubing. Oversized parts are stiffer, and can be lighter for their weight if the walls are made thin enough. If the walls become too thin, however, they become too easy to damage by denting. Traditional forks used 1" (25.4 mm) diameter steerers. Oversized steerers are 1 1/8" (28.6 mm) or, less commonly, 1 1/4" (31.8 mm). Details on sizes are listed under headsets. Traditional frames used 1" (25.4 mm) top tubes, 1 1/8" (28.6 mm) seat tubesand down tubes, and 1 1/4" (31.8 mm) head tubes. When BMX racing became popular, frames built to these old standards couldn't always hold up to the rigors of BMX competition. Since the wide availability of T.I.G. welding freed designers from the need to use tubes that would fit standard-size lugs, oversized tubing became the norm for BMX frames. This design and technology were later adopted by builders of mountain bikes. In the interest of improved chainwheel/tire clearance, some mountain bikes have "oversized" bottom brackets, with a shell width of 73 mm, rather than the standard 68 mm. > On Feb 17, 2014, at 5:30 PM, Eric Daume <ericda...@gmail.com> wrote: > > Traditional steel road bikes (ie, through the very early 90s) used a 25.4mm > top tube and a 28.6mm down tube. Riv uses a 28.6mm top tube and a 31.8mm down > tube (in inches, 1", 1-1/8", and 1-1/4"). > > >> On Mon, Feb 17, 2014 at 8:22 PM, Michael <john11.2...@gmail.com> wrote: >> I have heard some say that RBW uses oversized tubing on their bikes. >> >> But their tubes don't look any bigger to me than other steel bikes. >> >> What does this term mean in reference to RBW bikes? >> -- >> You received this message because you are subscribed to the Google Groups >> "RBW Owners Bunch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to rbw-owners-bunch+unsubscr...@googlegroups.com. >> To post to this group, send email to rbw-owners-bunch@googlegroups.com. >> Visit this group at http://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/groups/opt_out. > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rbw-owners-bunch+unsubscr...@googlegroups.com. > To post to this group, send email to rbw-owners-bunch@googlegroups.com. > Visit this group at http://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/groups/opt_out.
