The Proteus Framebuilding Book - Proteus Bicycles

Recommendations

Info

Seat & Chain Stays 4 piecesFork Column 1Brake Bridge 1(Chain Stay Bridge) OptionalIt's up to the bike builder to build it properly. Reynolds makesthe right kind of bike tubing!Head tubes m,ay be conveniently inspected by removing thefork from the main frame. You should then be able to inspectthe interior of the straight gage head tube for the existenceor nonexistence of a weld and the fork column interior for asingle butt.Other short comings are sometimes the use of seamed stockfor one of the other eleven pieces of tubing of a cycle frame,or the use of a non-butted straight gage variety, where it isnot expected. One or two butts are expected for the main tubes.It is common to have a double butted top tube.An explanation for the term butting is now necessary. Theterm butt is an English term meaning a controlled change in tubewall thickness. Butted cycle tubes are thicker at its ends forstrength, stability, and weight. Reynolds has a brochure, whichis available to anyone with whom the Reynolds have an inclinationto respond, that admirably explains the mechanics of butting.Here in the U.S.A., our tube manufacturers refer to this processas "upsetting." At one time, U. S. manufacturers produced singlebutted tubing. Another interesting process applies to the forksand stays and that is "tube reduction." Were it not for thisprocess, the smaller ends of the forks and stays would have thickerwalls than the larger end. The English refer to this "tube reduction"process as butting too.100
The three nain Reynolds tubes are impression stamped.If the paint is not too thick and if the impression was notremoved during any grit blasting or filing by the frame builder,this identification can show what kind of tubing it is. Sometube manufacturers sometimes stamp the other tubes of the set.Low quality forks and stays can be easily spread apartor together without the expected spring back. Reynolds forkblades are impression stamped and they respond properly to thistest. This is a simple test to perform.If the bottom bracket axle assembly is removed, then theseat and down tubes may then be inspected for any seams andany butts. Seams are obvious. The butts are small but perceptible.Look into the chain stay while you're at it. Removethe seat pin to aid in viewing the seat tube interior.The three m.ain tubes may sometimes be tapped with a cointo detect tube changes in thickness. Remove the seat pin forthis test too. The seat stays and front forks are difficult toinspect without any expense beyond the spring back test mentionedearlier. Should the widest section of the seat stays be greaterthan 5/8", it most likely is not Reynolds. ,Know what you're buying I ThatReynolds sticker and Guaranteeare an inducement to buy. Should you have such a bogus frame,you may find it difficult to obtain satisfaction. The big cyclemanufacturers will fight you off and may even intimidate you forthey know better.' Only pay for what you know you are getting--first quality tubing from a first quality builder--and let's keepthem honest by inspecting for conformance what they sell beforeyou write that check.101
Page 1:
7PROTEUS DESIGN INC.THE PROTEUSFRAM
Page 5:
I would like to thank the following
Page 9:
Painting''Metal Preparation 77Apply
Page 12 and 13:
Just get ones with metric, or Engli
Page 14 and 15:
,It is not necessary to use differe
Page 16 and 17:
.frame more responsive and less ene
Page 18 and 19:
The other consideration, clearance,
Page 20 and 21:
Thisthe axle center to the ground.
Page 22 and 23:
connecting the center of the bottom
Page 24 and 25:
Roadgauge of tubing. Most sets avai
Page 26 and 27:
efore any damage will occur. So eve
Page 28:
The first miter you will work on is
Page 31 and 32:
the bottom bracket shell and hold t
Page 33:
Preparing the LugsThe next step is
Page 36 and 37:
CenterlineFig. 3If possible, use so
Page 38 and 39:
area where the clamp was. Turn the
Page 40 and 41:
.8the frame will have cooled enough
Page 42 and 43:
.touch anything. You don't have to
Page 44 and 45:
kept in mind. First, the style of j
Page 46 and 47:
The dropout may be able to swing a
Page 48 and 49:
Using the scribe marks as a guide,
Page 50 and 51:
Gently remove the wheel. Don't worr
Page 52 and 53:
and bend the dropout to correct the
Page 54:
that you are ruining your frame. Th
Page 58:
.Use a small round file for this. T
Page 61 and 62: crushed. At this point the end shou
Page 63 and 64: especially true with silver, which
Page 65 and 66: emain in the right place and you ca
Page 68 and 69: .is much easier to work on them whe
Page 71 and 72: the board. (See Fig. 5B.)Lay the st
Page 73 and 74: Fixing the 2" x 4" axle assembly to
Page 75 and 76: Correct blade angle ,. WrongangleFi
Page 77 and 78: the right and left measurements are
Page 79 and 80: ItLots of points, you may want to s
Page 81 and 82: the lugs and fork crown. For final
Page 83 and 84: PointsNext, using a curved or large
Page 85 and 86: frame. Two popular styles are domed
Page 87 and 88: IPaintingrub your fingers over all
Page 90 and 91: .necessary to use small pieces of s
Page 92 and 93: Fig 2
Page 94 and 95: .wascomplete.Applying the PrimerA p
Page 96 and 97: .ofthink it'd be clean. Chances are
Page 98 and 99: a similar method. At- this point it
Page 100 and 101: To..only exposed a few tiny spots o
Page 102 and 103: Peoplepaint to give a bright, shiny
Page 104 and 105: OneAcrylic.and the frame can be bui
Page 106 and 107: the frame members apart. The diffic
Page 108 and 109: \bottom bracket or the seat tube ou
Page 112: Proteus Design framebuilders are pr
show all

The Proteus Framebuilding Book - Proteus Bicycles

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?