Author Topic: Maximum gear capacity / chain length  (Read 2875 times)

jiberjaber

  • ... Fancy Pants \o/ ...
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Re: Maximum gear capacity / chain length
« Reply #25 on: April 18, 2018, 10:49:36 am »
I've entered Deano's Most Excellent off-road 100, but I'm a right fat fucker at the moment, so I need to gear my CAADX down from the 11-28 11sp cassette it comes with. I'm looking at a Shimano 11-42 MTB cassette, but I'm kind of concerned there won't be the capacity for that. The front has 46/36.

Am I right to be concerned?*

* About the gearing, that is - I know I'm right to be concerned about being a right fat fucker.

Wolf link and that cassette would compare like a compact and 12-36 cassette (though unable to help on how much more chain you would need):
http://www.ritzelrechner.de/?GR=DERS&KB=36,46&RZ=11,13,15,17,19,21,24,28,32,37,42&UF=2192&TF=80&SL=2.5&UN=KMH&GR2=DERS&KB2=34,50&RZ2=12,13,15,17,19,21,23,25,27,30,34,39&UF2=2192


Here's a comparison of 11-28 vrs that cassette:
http://www.ritzelrechner.de/?GR=DERS&KB=36,46&RZ=11,13,15,17,19,21,24,28,32,37,42&UF=2192&TF=80&SL=2.5&UN=KMH&GR2=DERS&KB2=36,46&RZ2=11,12,13,14,15,17,19,21,23,25,28&UF2=2192
Regards,

Joergen

fboab

  • It's a fecking serious business, riding a bike
Re: Maximum gear capacity / chain length
« Reply #26 on: April 18, 2018, 03:15:40 pm »
How low are the gears on the tandem, Chris?

Hahahahahhhahahahahahahaha

He's not the only fat fucker entered.

I might buy a new bike. With a motor.
TSS is not Total Sex Score, Chris!

LMT

Re: Maximum gear capacity / chain length
« Reply #27 on: April 18, 2018, 07:13:34 pm »
I currently run a 40/23 with a 11-46 on the rear with an Ultegra Shadow rear mech with a wolf link. No dramas at all and it will go large large (just). Not that I run it in that config.

23 --> 46   :o

^  Surely that's gone past the stage where it's quicker to get off and walk (or do you just not like getting your feet wet :) )

I built up the bike with the purpose of long distance hilly events, rather embarrasingly I've yet to tackle a hill on the bike with this set up but simulating a 20% grad on the Tacx Neo I'm looking at a cadence of just over 90rpm and just under 200 watts with 23*32. Well within threshold, spinning to win.

And 40*11 means the bike will still go at a fair lick, going down hills on a bent you are natuarally faster due to better aero so not bothered about spinning out.

Re: Maximum gear capacity / chain length
« Reply #28 on: April 18, 2018, 08:56:09 pm »
Chris
Do you have the wherewithal to bodge up a 'super-compact' like this?
Running an 11-32 cassette with a 105 set up (5800GS rear mech) quite happily.

ElyDave

  • Royal and Ancient Polar Bear Society member 263583
Re: Maximum gear capacity / chain length
« Reply #29 on: April 19, 2018, 12:57:10 pm »
Are shimano MTB and road cassettes cross compatible? I.e will an MTB cassette work with my 105 derailleur and ultegra shifter? 10sp BTW.
“Procrastination is the thief of time, collar him.” –Charles Dickens

jiberjaber

  • ... Fancy Pants \o/ ...
  • ACME S&M^2
Re: Maximum gear capacity / chain length
« Reply #30 on: April 19, 2018, 02:57:40 pm »
Are shimano MTB and road cassettes cross compatible? I.e will an MTB cassette work with my 105 derailleur and ultegra shifter? 10sp BTW.

Seems to be compatible with my Tiagra RD, 105 shifters and chainset.  When I was having problems with the chain jumping on the cassette I assumed it was because I hadn't used the dynasys slx mtb specific chain and bought one to replace the standard 10spd road chain I had put on.  When I compared the two chains they were exactly the same dimensions so I decided to remove and refit the cassette which then resolved the jumping!
Regards,

Joergen

ElyDave

  • Royal and Ancient Polar Bear Society member 263583
Re: Maximum gear capacity / chain length
« Reply #31 on: April 19, 2018, 03:16:08 pm »
Are shimano MTB and road cassettes cross compatible? I.e will an MTB cassette work with my 105 derailleur and ultegra shifter? 10sp BTW.

Seems to be compatible with my Tiagra RD, 105 shifters and chainset.  When I was having problems with the chain jumping on the cassette I assumed it was because I hadn't used the dynasys slx mtb specific chain and bought one to replace the standard 10spd road chain I had put on.  When I compared the two chains they were exactly the same dimensions so I decided to remove and refit the cassette which then resolved the jumping!

Ta, I'm looking for a lower gearing option for the cruzbike for the summer tour. It was OK last weekend in the 30 x 28, but I think a 32 might be better with load
“Procrastination is the thief of time, collar him.” –Charles Dickens

jiberjaber

  • ... Fancy Pants \o/ ...
  • ACME S&M^2
Re: Maximum gear capacity / chain length
« Reply #32 on: April 19, 2018, 03:26:32 pm »
Are shimano MTB and road cassettes cross compatible? I.e will an MTB cassette work with my 105 derailleur and ultegra shifter? 10sp BTW.

Seems to be compatible with my Tiagra RD, 105 shifters and chainset.  When I was having problems with the chain jumping on the cassette I assumed it was because I hadn't used the dynasys slx mtb specific chain and bought one to replace the standard 10spd road chain I had put on.  When I compared the two chains they were exactly the same dimensions so I decided to remove and refit the cassette which then resolved the jumping!

Ta, I'm looking for a lower gearing option for the cruzbike for the summer tour. It was OK last weekend in the 30 x 28, but I think a 32 might be better with load

There's Tiagra 10sp cassettes up to 34 if you want to be super confident of it working (this is what I had on before - I only went lower to help spin more on uneven ground)
Regards,

Joergen

ElyDave

  • Royal and Ancient Polar Bear Society member 263583
Re: Maximum gear capacity / chain length
« Reply #33 on: May 04, 2018, 10:25:13 pm »
Went with the 12-32 in the end, been riding it this week much better. Been spending far more time in the big ring on the flat
“Procrastination is the thief of time, collar him.” –Charles Dickens