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Re: Velobuild VB-R-218
Hellooo fellow triathletes! I wouldn't have thought that my sketchy TT setup actually does draw attention, but this is a forum of people riding sketchy frames from (partly) unknown sources, so theres that. Let me share my journey for you guys, I can also share the 3d print files as .stl or solidworks-file if anyone wants them. Short disclaimer regarding 3d printing: Please, for the love of god, only use 3d printed parts on bikes if you absolutely know what you are doing. 3d printed parts are not rigid enough to be used in any tensile stress - especially because the layer lines can break apart easily. If you pay close attention to the 3d printed parts that I use, you'll see that all of them are used in compression only. - After lots of resarch I did not find any dogma fitting aero connectors, so I purchased the giant propel aero connectors (GTIN: 4713250834511). Hoping they would somehow fit. They did not fit, and clamping them down like this would have definitely damaged the handlebars (see first picture). - I have then 3d printed banana-shaped adapters from a soft-ish rubber material (TPU, for those who are familiar with 3d printing materials), to adapt the giant-shape to the handlebar of the VB218. This has worked out okay-ish (see 2nd + 3rd picture) but the armpads were too wide apart and too far forward. - In the first ride on my hometrainer, I have noticed, that these rubber bananas create side-to side flexibility. - I have then had a local shop cnc mill an aluminium plate (see 4th picture) to solve two things: a) side to side flexibility and b) give me more options of placement, especially fore/aft, and distance between the armpads. This has worked execptionally well, as it gives enough variability in position, but also is super stable without clamping down too hard on the handlebars. What I also did to improve the TT fit on this bike: - get an ISM PN1.0 saddle (move wayy forward) - get a 0° setback seatpost Still on my list to do: - get a between the arms bottle - print a rear box, similar to what the guys at 4-frames do. First protoype is done already (see 5th picture) - ride more - get a TT frame (project for next winter  )I've been contemplating getting these to try on 218 bars.Hi JonMS, these might actually fit - but I suppose you'll also need some kind of rubber adapters. May 13, 2024, 02:29:23 PM |
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