Vado 6.0: Redshift ShockStop Endurance Seat-Post (30.9 x 400 mm) and Praxis EC-SBC-165A E-Cranks
Redshift Sports now offer their suspension seat-post in four standard diameters and in several lengths as well as three types. (The brand must have understood that, say, a 27.2 mm diameter seatpost with a shim for 30.9 seat-tube was not the most competitive of ideas, so they now make a full assortment of suspension seat-posts).
Following the damage of my Cirrus Cycles Kinekt 2.1 suspension seat-post (which I was unable to repair so far), I ordered a new Redshift ShockStop suspension seat-post in size 30.9 x 400 mm. I was not sure whether that would work at all! The frame on my Vado 6.0 is not typical: it is a Step-Thru size S. My body build is short legs with a long torso and arms. Therefore, there was a balance between a very short space inside the seat-tube (to the junction with the frame top tube), and a long seat post. Necessary to mention the ShockStop has a big Minimum Insertion Length of 100 mm, and the post cannot be trimmed as its bottom part holds the spring assembly.
The initial measurement proved the seatpost size choice was proper. As always, the devil was in the details. As I completed installing the greased inner spring (that was necessary to accomodate my 100 kg body weight) and reassembled the unit (everything was very easy) as well as installed the saddle, I inserted the seat-post into the seat-tube to the very bottom. Then I turned pale when I found that the saddle height was 72 cm, whereas I needed 71... A saddle being a centimetre too high is a no-go for me.
OK. I took the seat-post out and turned the preload plug at the bottom to the "closed" position, making the seat-post as short as possible. It let me lower the saddle by a half centimetre.
The test ride has proved the new part was rideable. There was a minimal sag when I mounted the e-bike. No bouncing, no pedal-bob and the suspension action was very good even if the saddle was firm. However, my body told me it would feel a way better another half a centimetre lower...
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The geometry of the e-bike is correct, only I dream of having the pedals a tad closer to my feet...
I think I have found a solutions. The old cranks are 170 mm. If I install the 165 mm ones, everything should be perfect?
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I have ordered a set from an online store in Italy for 80 EUR plus shipment. Let us see!
Besides, it looks Praxis Works in the United States has a lot of compatible parts in its online store!
@GuruUno: Didn't you change cranks on one of your Specialized e-bikes? Something I should be aware of?