Tein HA pillowball installation & bump travel info
Comparison between the OEM and HA P/U mounts. Note the raised bearing location and the improved access... Show more for bump compression.
The OEM perch as the bumpstop first contacts the shock. Ride height is 290mm. Note that this doesn't include the thickness of the shock boot which would have limited travel more.
The PU mount with the bumpstop just contacting the shock. Ride height is 280mm (ie, an extra 10mm of bump travel is gained). The difference looks greater, it's just parallax error from the different photography angles. Note that the bumpstop has been inverted - why? see below...
Normal bumpstop orientation as supplied by the factory. Note that it will first contact the small collar.
Inverting the bumstop means it can go around the first collar and will contact the larger collar - increasing the available travel. This change would be effective when used with either the OEM or PU shock mounts
The shock boot does not fit around the collars. (I know it actually mounts below the collars, but it would still interfere with the available bump travel. It is about 3mm thick, so you could gain an extra 4mm or so of travel by removing it...
The hole in the boot has been opened up so it fits around the collars. Just cut with a sharp knife. This allows uninhibited shock travel.
The complete rear shock assembly ready to reinstall.
All up the mods added 10-15mm of extra bump travel. If one were able to bore out the bump stop a few more mm so it fitted over the large collar, you could gain an extra bit of travel.
I also measured the available travel of the front shocks (I still use OEM perches there). The bumpstops first contacted the shocks at 275mm ride height. Show Less