Join Date: Jul 2016
Location: Melbourne, Australia
Hi all, as a new Forum member I thought I would join this thread. I have had the DCT AT since April this year, and wanted to lower it as I am only 5”8” with short legs, but when the AT first came out I could not find anyone who did a lowering kit. Now I have found three – (and I see in this thread a fourth, HyperPro in the Netherlands). Metisse in Germany do a very simple rear spring spacer that they say lowers the bike by 30mm so I purchased this but I reckoned it would only lower the whole bike about 20mm at most, so haven’t fitted it (I see that someone else has tried this and the lowering was only 15mm). Wilbers in Germany and their various agents throughout the world also now do complete replacement rear and front shocks for 30mm and 60mm lowering – probably very good but also very costly. In the end I used Krooztune here in Boronia, Victoria, Australia who fitted a new NC machined rear “dogbone” U link, modified front fork internals but same stock springs for equal lowering front and back, and a shorter side stand. The result is a lowering of 40mm overall with the high quality kit, which suits me perfectly, and does not compromise the ground clearance and lean angles too much. I don’t intend to do really serious offroading but do like to lean on open roads, so lean angle is more important to me than ground clearance and suspension travel.
I am a professional mechanical engineer so a bit anal about design, but for those who are interested in figures here are mine, based on fairly accurate measurements. This is based on the standard DCT AT with the default suspension settings, without any heavy accessories fitted, tank half full, myself as the 95kg rider sitting on the bike, and standard seat in the low position. The slightly rounded figures are mm and degrees before/after lowering. Seat height 840/800, ground clearance 220/180, static lean angle 50/45, front shocks stroke 230/195, rear wheel travel 220/210. If I fully wind up both front and rear springs to max pre-load then the bike height increases by 8mm, and oddly enough if I wind back both the preloads to zero then the bike lowers by 8mm also. The overall vertical bike stiffness is 3 kg/mm, so with a 95kg rider the bike lowers by 33mm. Since the mods done to my bike use the same stock springs, the above differences should be closely the same for the standard bike.