Search results

Date Relevance Most replies

  1. B

    Astral Rune build thread

    Nice work! I like how cleverly you attach to existing frame features, the freewheel spinning on crank spindle, the motor mounted to pivots. I am curious as to your motor selection, it would seem the overall ratio is ca. 24, with 27.5 wheels, 145 Kv motor and 45V average battery your top speed...
  2. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    This has been discussed here: https://endless-sphere.com/forums/viewtopic.php?f=28&t=47618&p=850836&hilit=csk35+failure#p850836 As I said, there was not enough room for a CSK40 in my setup, both on the axle and within 104 mm BCD chainrings, therefore I took the plunge with a CSK35 + support...
  3. B

    Only the poor want ebikes

    ...depreciation, that painfully kicks in as soon as you're out on the market for a new ride....
  4. B

    Only the poor want ebikes

    If you always do the same, you always get the same in return.... Why not skip the cost issue and focus on benefits? Benefit to your interlocutor 's needs, not yours. Takes a bit of inquiring, I know.
  5. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    I couldn't be happier with your reply, thanks a million! 8) Now, is there anyone out there to take on Chalo's challenge of fitting a CSK40 to the FC-M815? That is to boost rider weight rating to some 150+ kgs or DH Elites stomping on their pedals... A word of caution: the FC-M815 fits an 83...
  6. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Good 'ol cranky cheeky Chalo, thanks for chiming in :lol: One would have though why not use a CSK40 and larger BCD chainrings? I can see there are 38T 130 BCD ones but... the added width of a CSK40 would consume too much axle real estate and you would not be able to fit the left crank arm...
  7. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Unlike cycloid gearboxes, my drive unit is vibration-free (belt primary and planetary secondary), therefore I believe in my construction the the key is sufficiently immobilised in all three axes: 1. inside the steel clutch keyway along its entire length to "left and right" and "up and down" and...
  8. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Absolutely not :) , we are exchanging ideas with no personal implication Your understanding is absolutely correct :mrgreen: Last, but not least, the red polyurethane v-profile compression seal keeps the elements out - the freewheeling acts without drag and has been maintenance-free since...
  9. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Thanks :D So far I made 1100km offroad, a handful of DH runs in a bikepark, jumps, shores, drops, the usual stuff :twisted: The bike handles just as well as before conversion, the confidence is there for sure, I ride faster, farther and longer. Regarding your remark, please remember, the...
  10. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Thanks spinningmagnets, glad you like my spinning magnets :lol:
  11. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Some parts I purchased, some of them I had made to my specification acc. to 3D design. The shopping list comprised the Shimano FC-M815-2 crankset, 2 x 38T 104mm BCD 5mm thick DH chainrings, a set of 4 15mm long MORTOP DH chainring bolts, Stieber CSK35PP sprag clutch, stainless 61811.2RS bearing...
  12. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    A picture speaks a thousand words, or so. The topic comes up now and then so for your viewing pleasure (hopefully) I posted images of my Shimano Hollowtech Saint freewheeling crankset.
  13. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Polyurethane V-profile compression seal
  14. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Stieber CSK35PP sprag clutch with a support bearing This is STRONG AND STEALTH. No ENO clicking. The Stieber CSK35PP is rated at 175 Nm nominal, twice that max. At 170 mm crank length, the crankset is strong enough for a 100 kg / 220 lbs rider STOMPING on his pedals :twisted:
  15. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Chainline is 51mm. Exactly the same as original.
  16. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    18 magnet ring for cadence sensing. It takes a quarter revolution to obtain an averaged reading of cadence plus direction Likewise, power off is real - time, no delay
  17. B

    Freewheeling Design for the Shimano Hollowtec II Crankset

    Shimano Saint Hollowtech freewheeling crankset 170mm arm 2 x 38t 104mm BCD chainrings
  18. B

    Looking for a battery charger (with balance)

    If I understand correctly, A123 is ~130 Wh/kg, LiPo is ~220Wh/g. Energy density makes a difference to me considering I carry the battery in a backpack, it's a fun machine, you know :D Safety and performance again mutually exclusive?
  19. B

    Looking for a battery charger (with balance)

    1100EUR actually with BT and power supply, much cheaper than rebuilding your house after one BMS failure. If you survive the fire.... Call me paranoid, I never use a BMS, only use naked LiPo, always balance-charge every single time, never unattended, always monitoring battery temperature and...
  20. B

    Looking for a battery charger (with balance)

    What is expensive? Have we already forgotten what a BMS did to Dan's house? https://endless-sphere.com/forums/viewtopic.php?f=1&t=87975
  21. B

    Looking for a battery charger (with balance)

    Just in case you ever considered a premium product, here is what I personally find the Holy Grail of RC chargers these days: https://www.pp-rc.de/CHARGING-TECHNIC/ACCU-CHARGER/Profi-accucharger-Pulsar-3.htm?shop=pp-rc_en&a=article&ProdNr=1234V&p=6 It's amazing how true it remains that "you...
Back
Top