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Apart from Gravity Dropper, I haven't done very well at finding information about what the minimum length of different dropper posts are.
and that's so badly worded, what I mean is this. If I have, for example, 200mm from seat collar to saddle rail with my normal seatpost in my preferred riding uphill position, how do I know which droppers will fit, ie when in their up position will allow me to have my saddle at the right height rather than too high.
I'm tired, is this even making sense?
33 inside leg so a 150 fits for me, hth a bit
Lawmanmx - Member
33 inside leg so a 150 fits for me, hth a bit
Is a pointless way to measure a post as we have no idea what bike etc.
200mm sounds tight for a 150mm drop on some as the top collar and top is close to 50mm, slightly less on a Lev from experience. Have you tried the RS/KS sites for tech?
I have, and not found a definitive answer.
There's a chart somewhere on the BR forum with all the most popular models. A 100mm Reverb needs 195mm from seatclamp to saddle rails iirc, so anything longer is almost certainly out of the question.
Just measured the 150mm Lev on mine (18 months old) and it's probably 210 from the insert point to the rails, the other one was an older 125mm Reverb and it's 190mm from the nut to the rails - though about 3 years old.
I have a Lev here, 100mm travel 27.2.
With the post fully down, centre of rail clamp to the highest usable portion of the static post is 65mm.
Assuming the design is the same for the larger diameters, for a 150mm travel post you would need 215mm showing. If 200mm is your limit then a 125mm would be the safer bet.
Thanks, those get me in the ballpark.
Possibly this one warpcow?
http://www.bikeradar.com/forums/viewtopic.php?t=12971373&p=18900218
I'm v confused about this too but as it's for a nerf amp I haven't got yet and I don't have a fixed post of the right diameter either I'm not sure how I,m going to work it out.
Just borrow a post from a mate?
Simple and quickest way is to get the measurement from insert point to saddle rails then check against the droppers fully extended.
Yeah, guess it will be easy enough to ring a shop and ask for the measurement, I was just looking for something pretty much like the table warpcow mentioned, which I think I've found ^.
Pedlad - I suppose you could measure pedal axle to saddle rail, then do some sums based on the geometry of your new frame.
New frame that should have read
Yes will have a go at this
Pedlad - I suppose you could measure pedal axle to saddle rail, then do some sums based on the geometry of your new frame.
And just wait and borrow a post if needs be...
That's the one. Must have been the 125 Reverb I was thinking of.
bm