Interesting crank set

[viengsavanh]

Think i have heard of these or this system



https://www.ebay.co.uk/itm/236098534059?_trkparms=amclksrc=ITM&aid=1110006&algo=HOMESPLICE.SIM&ao=1&asc=264184&meid=b499035e211e4d46bc10e3a7bc050485&pid=101875&rk=4&rkt=4&sd=167546777426&itm=236098534059&pmt=1&noa=0&pg=2332490&algv=SimVIDwebV3WithCPCExpansionEmbeddingSearchQuerySemanticBroadMatchSingularityRecallReplaceKnnV4WithVectorDbNsOptHotPlRecallCIICentroidCoviewCPCAuto&brand=Rotor&_trksid=p2332490.c101875.m1851&itmprp=cksum:236098534059b499035e211e4d46bc10e3a7bc050485|enc:AQAKAAABgG96wQ16jds4VFcrhy1F3d4mbwZUJI9Fs%2BgdXYAHIzlX2e3YaNh7x%2BEnKA3G%2BCqSl1Xn4McfcWFK1GytmS2qxJ87mtE8Gm3iR1Ja4WBwh0hNHJrJx3Ki5mp04ow4CO7lP%2BooCybZDDU%2BbbSwmg7CbTin%2BBzBzbCYVnbjvyQAHu6--HI4MB7SvJl5IJqlyvomgoLMlgT6qAJzX0SANJhty2dFHF8Bl51qhJ9ws6DWyPXdY3X6vs7jXiL%2BsCvvlwOY--p3x015Hibx%2BTGCHCIkmT67UvsBZpEnknPPyfndC3la644%2BM0JmgQ6IxaBSURgBoI3cATUpGczh9zmV4ylnPJwMnV4m8DtQiI8nRJ6E1AkQFmTMe23VnpzUZ81KJhLd047H1HVdd8t3t0FzJLxNpI2nN%2BUEgVsNw%2FzPesWp4tRjo72T0aVcCBFajAySvQikh0aOW43pkpA2ZR58XKdVI%2FE%2FsMINm0p4MuBmz0w9DdWQ24oR5rk5NturRhQ7navhVQ%3D%3D|ampidL_CLK|clp:2332490&itmmeta=01JXDYHNY9N84FA86M68XQPS90

 

[Sundayjumper]

Good grief that’s a URL & a half !

You can trim everything after the first question mark:

https://www.ebay.co.uk/itm/236098534059

 

[Tsundere]

Holy trackers Batman

 

[bikeworkshop]

Some discussion and elucidation in this thread:

Sprinkle liberally with fairy dust before using, for best effect.