RM Vertex Scandium Frame - 1.3kg !!
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suburbanreuben
Old School Grand Master
Because it's easier to measure than effective. Many people haven't a clue what effective tt is or how to measure it.gump":2usmf3tk said:hmmm not sure why the actual tt matters tbh, but up to you.
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suburbanreuben":ye6iv858 said:Because it's easier to measure than effective. Many people haven't a clue what effective tt is or how to measure it.gump":ye6iv858 said:hmmm not sure why the actual tt matters tbh, but up to you.
but with the slight problem that your reach will change with frame design, one actual top tube length is not the the same as another for a given bike length, hence effective being used. If you're looking for a 22" actual top tube, the bike may be longer or shorter than you expect.
Rocky Mountain (and Kona and many) use effective (or horizonal top tube length) since Retro Times. Even On-one do and there from Yorkshire.
(even if effective changes with fork length you still know were the bars will be assuming same stem/bar setup
)Nice bike, if I bought it would it come with a free pre 95 Altitude?
suburbanreuben
Old School Grand Master
:roll:FluffyChicken":3ox2lgvw said:suburbanreuben":3ox2lgvw said:Because it's easier to measure than effective. Many people haven't a clue what effective tt is or how to measure it.gump":3ox2lgvw said:hmmm not sure why the actual tt matters tbh, but up to you.
but with the slight problem that your reach will change with frame design, one actual top tube length is not the the same as another for a given bike length, hence effective being used. If you're looking for a 22" actual top tube, the bike may be longer or shorter than you expect.
(even if effective changes with fork length you still know were the bars will be assuming same stem/bar setup
Nice bike, if I bought it would it come with a free pre 95 Altitude?
It's really just a check. Someone might give the tt lenghth as, say, 22.5". If that is actual, then itmight be long enough. If it's effective, it won't be. Having both, and both looking plausible, indicates that the seller is probably measuring it properly.
Some sellers, however, don't think it important to include tt length at all...
Sometimes they might not
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gump":1l18yibf said:Effective is ~22.5"
Not sure what actual is.
ST c-t = 18.5"
ST c-c = 15.5" (nice slopey tt)
CS = 16.75"
HT = 120mm 1-1/8"
BB = 73mm
If iti's the same as the 2000 version which was white-white colour and claimed 2.9lb (18.5")
Then it has geometry 71/73 and 585mm (or 23") effective top tube
suburbanreuben
Old School Grand Master
Which differs from measured. Exactly why I ask for both measurements...FluffyChicken":yhimbk92 said:gump":yhimbk92 said:Effective is ~22.5"
Not sure what actual is.
ST c-t = 18.5"
ST c-c = 15.5" (nice slopey tt
CS = 16.75"
HT = 120mm 1-1/8"
BB = 73mm
If iti's the same as the 2000 version which was white-white colour and claimed 2.9lb (18.5")
Then it has geometry 71/73 and 585mm (or 23") effective top tube
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I don't think it was measure as it was an ~ value given ?suburbanreuben":116yg8q1 said:Which differs from measured. Exactly why I ask for both measurements...FluffyChicken":116yg8q1 said:gump":116yg8q1 said:Effective is ~22.5"
Not sure what actual is.
ST c-t = 18.5"
ST c-c = 15.5" (nice slopey tt
CS = 16.75"
HT = 120mm 1-1/8"
BB = 73mm
If iti's the same as the 2000 version which was white-white colour and claimed 2.9lb (18.5")
Then it has geometry 71/73 and 585mm (or 23") effective top tube
Still depends if people measure actual as centre of seat to centre of head along the tube (what I would measure) or between these tubes (what some people measure). Though you did ask for C2C
I stick to finding the quoted lengths if I can, never believe anyone
23" effective is a 18" Kona (mid/late 90's) length for anyone comparing
Shoudl take 26.8 seatpost,
31.8 top-pull front mech
and would be designed for Marzocchi Bomber Z-2 X- Fly, 3.15" travel as that what it came with built up.
Bump.
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