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Old 01-11-22 | 08:14 AM
  #166  
T-Mar
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Don't go strictly by model names. While it will help you narrow down the search, the tubeset can be year dependent. For instance, the early version of the above mentioned Apollo Prestige was built with hi-tensile steel (see attached photos). Once you find a model that may be CrMo, take a close look at the tubing decal for confirmation.

Also, all CrMo frames are not the same. There's plain gauge, single butted, double butted, triple butted and quadruple butted, and various thicknesses for each. Some frames may also use only a partial CrMo tubeset. It's very common to use CrMo only for the three main tubes and to use lesser grade carbon-manganese or hi-tensile steel for the stays and forks. Some manufacturers even use only a single CrMo tube, just so they can slap on a CrMo decal.

If the decal states PG, plain gauge, straight gauge or doesn't mention butting, that means the tubes have a constant thickness along their entire length. Butted tubes are thinner in their mid-section, for lightness and resiliency.

If the decals indicates CrMo and states "tube" (singular) you've only got a single CrMo main tube. If it says '"tubes" (plural), then you've got CrMo in at least two of the main tubes, though it's usually all three of the main tubes. It it says. "tubes, forks and stays", then the entire frameset is CrMo.

In the above examples of decals posted Hummer, the first decal indcates a full CrMo frameset, with butted main tubes.

In the second example, it is plain gauge CrMo, only in the three main tubes.

In the third example, the frame has only a single, plain gauge, CrMo tube.


Last edited by T-Mar; 01-11-22 at 08:18 AM.
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