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Frame Geometries |
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- TITANFLEX's
cantilevered booms come in three flavors: MOCHA, ROCKY
ROAD and CHUNKY MONKEY. Weighing in
at 340, 420 and 510 grams, respectively; they are considerably lighter than
Softride's beams.
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- The length of the boom's
extension effects the amount of seat deflection under a given saddle load.
The boom's extension--in conjunction with the saddle's position on the seat
post--also effects the seat tube angle. You can manipulate the boom
extension, saddle rail position, and stem length to achieve a custom
combination of seat tube angle, top tube length and suspension
travel...without sacrificing stand-over height.
The table below charts the variables related to boom extension, which is
measured from the bottom end of the receiver tube rearward to the seat post
binder bolt. Boom deflection is measured vertically at the same binder bolt
point. Suppose you're a 185* lb. triathlete and invested in 650c race wheels. The mocha
boom with a 650c frame is your ticket to
the podium. Or, you're a retired NFL linebacker who's slimmed down to
225**
lb. and ready to test your glutes on the Queen K.
The rocky road
boom with a 700c frame will put you in the hunt. Finally, if Paul Bunyan^ is
a distant relative, with the XL-700 frame and chunky monkey boom you'll be
able to rival the wake turbulence of a semi tractor-trailer. Select your platform
thusly!
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Boom Extens. |
Maximum Rider Weight (lb) |
|
Vertical Deflection^^ |
|
Seat Angle°
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|
Top Tube Length (cm) |
|
(cm) |
MOCHA |
R-ROAD |
CHN-MONK |
|
(cm) |
(cm) |
(cm) |
(cm) |
|
(700c) |
(650c) |
|
(700c) |
(M-700c) |
(650c) |
(S-650c) |
|
28.8 |
225 |
265 |
305 |
|
1.0 |
0.8 |
0.3 |
0.2 |
|
81 |
84 |
|
50.4 |
46.9 |
50.4 |
45.5 |
|
30.8 |
215 |
255 |
295 |
|
1.2 |
1.0 |
0.5 |
0.3 |
|
78.8 |
81.8 |
|
52.3 |
48.9 |
52.3 |
47.4 |
|
32.7 |
205 |
245 |
285 |
|
1.4 |
1.2 |
0.7 |
0.4 |
|
76.7 |
79.6 |
|
54.5 |
51.0 |
54.5 |
49.6 |
|
34.6 |
195 |
235 |
275 |
|
1.6 |
1.4 |
0.9 |
0.5 |
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74.6 |
77.3 |
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56.5 |
53.0 |
56.5 |
51.6 |
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36.5 |
185* |
225** |
265^ |
|
1.8 |
1.6 |
1.1 |
0.6 |
|
72.5 |
75 |
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58.5 |
55.0 |
58.2 |
53.3 |
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^^...under 100 pounds
of static load, an industry standard reference, a rider's weight is
distributed between the saddle, pedals and handlebars. A 165 lb. rider in a
time trial position carries about 55 lb. on the elbow pads, distributing the
balance of mass between the saddle and pedals. A more
conventional on the hoods position would put more weight on the saddle, but
never all 165 lb.
- The yield strength of
all TITANF
LEX
booms is certified by the supplier to be > 105,000 psi.
The proportional elastic limit of bending stress for this 3/2.5 alloy seamless
titanium tubing is 91% of its yield strength, as derived from actual fatigue
tests conducted by ANCOTECH, a member of our
military/industrial complex. The RockyRoad and Chunky Monkey
booms contain a dampening insert for added performance.
Translation: the boom will endure over a million load cycles up to twice
the maximum weights charted in the table above without failing or taking
a set. more than a million road test miles and a hundred-year warranty back-up
these boom specifications.
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