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  1. ak-tux

    Improving climbing on S40 Gen 6 with 1x11 drivetrain

    Was this a SRAM APEX derailleur? Mine (2019 S40) was works with 11 speed Sunrace 11-46 cassette(see below) . It will work with the existing 42T 1X chainring without adding a longer chain. I beleive it can alos take an 11-50 casstte.
  2. ak-tux

    S40 aero upgrades

    It is important to ensure your wrist is in line with the arm when you grip the handlebar. If it is twisted (up or down) it may strain due to the rythmic push/pull nature of the FWD moving Bottom Bracket system.
  3. ak-tux

    S40 aero upgrades

    Wow!, great DIY skills!
  4. ak-tux

    S40 aero upgrades

    Great! Any pictures? ... It is said that pictures speak! :)
  5. ak-tux

    S40 aero upgrades

    I think a combination of a large tailbag and covering the rear triangle has a cumulative aero effect. I don't have any scientific numbers to qualify it but the Parkers once shared a wind tunnel result (for V20) and the covered rear triangle had some notable advantage. "This saved 3.8 Watts at 0...
  6. ak-tux

    llavalle's A4X Build

    It looks like the handlebar is facing the opposite direction? It's swooping towards the rider instead of away? It should be like this right? :
  7. ak-tux

    A4X speculation

    I like the back of the seat idea. I use that on my S40. Especially if they are low. Practice it. It shall soon become second nature. I don't like adding weight to the boom or the handlebars (especially a water bottle). It affects the handling of the bike.
  8. ak-tux

    to a dam closeby

    Nice views! Keep at it, you will get stronger.
  9. ak-tux

    Affordable Aero Tailbags

    I , came across another affordable 5.8lt tailbag that needs no extra metal support to the frame. Found on AliExpress (https://www.aliexpress.com/item/1005008616672433.html ). I think it makes a good fit for S40 while still staying aero. It can take a small tool set, a rain jacket, phone, a...
  10. ak-tux

    Do I need an S40?

    I have an S40. I ride on tarmac most of the time and I can keep up (mostly) with my roadbike friends. Yes, it can be pretty fast when equipped with road specific components. If I was to ride gravel and relatively bumpy trails I think my speed will significantly reduce and so would the comfort...
  11. ak-tux

    Uphill

    7% on tarmac is pretty low to get a wheel slip unless your are pedaling squares! :D. Unless there is some loose sand on the surface or some slippery wet mud, I don't get wheel slip on good tarmac until around 13-15% or higher.
  12. ak-tux

    Brevet 200 km - Jabłonna - Poland

    Your S40 setup Looks really nice! I like the underseat bag! Are those short cranks or is it just my eyes?
  13. ak-tux

    Cheap trainer setup for proper fit

    Maybe write an email to @Robert Holler ( "support at cruzbike.com" ) of Cruzbike for advice on the correct length of the thru axle adapter for a classic Turbo Trainer. My S40 is the older type( year 2019) that came with quick release not thru axles.
  14. ak-tux

    Cheap trainer setup for proper fit

    Hi, You need a special through axle. There are many types on ebay e.t.c . Here is one https://www.ebay.com/itm/195471663777 Classic fluid trainers are better though. (Saris/CycleOps fluid2 or Kurt Kinetic). You can pick up used ones from ebay for about the same price. Also check this thread...
  15. ak-tux

    Fit Check: Knee Pain

    I use an opensource graphics tool called Gimp on Linux to measure the angles. Not the best but it works. For Windows try https://kinovea.org/features.html But it all assumes that the camera was perpendicular to the bicycle, otherwise the resulting angles will be skewed . You still did not...
  16. ak-tux

    Fit Check: Knee Pain

    Where is the knee pain, if I may ask? Is it at the front just above the knee cap, or at the out/inner sides e.t.c? Cleat position can also cuase knee discomfort you know. Hmm, Your knee angle looks like approx 142-145deg (the optimum range is usually between 145 to 155 deg)but the photo may not...
  17. ak-tux

    Q45 used with the Wahoo Kicker Snap

    I use a 2019-S40 with a wheel-on trainer ( A Kickr Snap motor attached to a modified Cyclops trainer frame ! ;) .. long story). I think the Q45 frontend is identical to an S40. So I believe it should work. The tyre, ideally, should be smooth with no treads otherwise it's going to be a noisy...
  18. ak-tux

    Affordable "Cruzbike" Short Cranks

    Happy new year, good people! A brief report on my short cranks "experiment" :) . So far, I have done about 350Km on these 150mm "Goldix" cranks on my homemade recumbent. The test terrain was rolling flat with some moderate steady climbs ( less than 6%). (I will install on my S40 once I can...
  19. ak-tux

    Q45 youtube video

    He has posted some more videos on the Q45. He is a natural communicator. Excellent content! Skills and Accessories Clippless pedals
  20. ak-tux

    Affordable "Cruzbike" Short Cranks

    Yes, basically, what @LarryOz said. Generally, all Cruzbike S40s with the standard (450mm) chainstays that come with the bike, for an average rider (height 178-180cm), will place the bottom bracket (BB) just slightly above the level of the seat base. This would qualify as a med BB. If however...
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