Many thanks for the input guys. To answer a question near the top, I ride mainly XC/enduro races and the standard 3 hour weekend blast when I'm not racing. All on the same bike.
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Chainset and ratio choice for 2 * 9 setup
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Posted 2 years ago #
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If your only using the inside two rings do you set the front mech up any differently? Looking at my three ring setup it looks like the mech is a good two centimetres from the middle ring. Do you move if further down the seatpost?
Stu.
Posted 2 years ago # -
I've got an FSA 44/29 with an 11/34. It doesn't miss the granny ring at all. However I'd rather be running a smaller big chainring as the jump is huge. Probably a 40 or 41. The stupid 94mm 4 bolt is not a real standard though..
22/32-36 on the front is fine if you're just mincing. (reaches for asbestos blanket)Posted 2 years ago # -
u02sgb
If your only using the inside two rings do you set the front mech up any differently? Looking at my three ring setup it looks like the mech is a good two centimetres from the middle ring. Do you move if further down the seatpost?
no, you can leave the mech where it is and adjust the limit screw in. You can drop it down, but you may bottom out the cage on the chainstay. Depends on the bike. OTOH, you can already buy 2 ring deuralliers, which have a smaller cage
Posted 2 years ago # -
36 x 11 with a 26" wheel shod with a 2.1 tyre = 25.3mph. Hardly fast - particularly on a road downhill.
Its not a random figure. Its calculated but it should have said at 100rpm. Which is a good cadence. You wont sustain higher than that for very long periods.
Posted 2 years ago # -
@freegan bikefascist
In that case, any recommendations for a 2 ring mech that's got he same cable pull as a shimano and would work wiht an inner and middle (say 22t and 34t or 36t)?
Posted 2 years ago # -
Swedish Chef - my advice would be go for 40/28 by converting what you have. 40T for XC/Enduros will be fine. I rode 42/30 on everything from Meridas/XC races/Enduros and some 24hr pairs. I rarely changed down into the 30T. The climbing at most UK events is not that severe and when it is its short and sharp.
Posted 2 years ago # -
In that case, any recommendations for a 2 ring mech that's got he same cable pull as a shimano and would work wiht an inner and middle (say 22t and 34t or 36t)?
There is really nothing special about front mechs. They all use the same amount of cable pull. You can use a road mech for a double chainset if your cable goes under your bottom bracket (bottom pull) of if you use a speen adapter. I use a SRAM Red front mech with an adapter on my Stumpy. Otherwise there's XX and I think there's an SLX double.
Posted 2 years ago # -
OK. I agree, 100rpm is not particularly fast, infact I'd say it's still a pretty comfortable cadence (some will be able to sustain higher cadence but we'll call that YOUR limit?).
So if that is given, how long are YOU able to sustain 25mph on a flat road using an MTB with an off-road set up for on your own then?Posted 2 years ago # -
Long enough that you'd lose ground in XC races at places like Sherwood and Thetford, and others with long fireroad sections!
Posted 2 years ago # -
I've been trying 26/38 up front with an 11-32 cassette this winter on my hardtail. There aren't too many big hills riding from the door (which is all I've really done for 4 months) so the gearing has been fine. I have an 11-34 cassette ready to go on soon though which should make bigger, steeper, longer climbs more comfortable.
I really like the double ring set up though and will probably convert my full susser as well.
Posted 2 years ago # -
22/ 36/ bash on the 456. TBH with a 50mm chainline the 36 is very close; not sure if a 40 would fit without changing the bb length. (or spacers for you posh dudes whodont do the square taper thing
Love the setup BTW. chose exactly the same for the meta
Posted 2 years ago # -
SO with an 11-34 cassette what is the optimal ring choice that minimses doubling up on gears and a bad chainline etc?
Posted 2 years ago # -
"In that case, any recommendations for a 2 ring mech that's got he same cable pull as a shimano and would work wiht an inner and middle (say 22t and 34t or 36t)? "
The SLX one works slightly better than my XT triple did- less chain clatter basically and it's easier to set up and more forgiving of bad adjustment/cable stretch/muck- but also, it's lighter, and cheaper. So I'd recommend that myself.
My own gearing is 11-34 cassette, 22 and 36 on the front but it sounds like you might want a slightly higher gear? I've never missed the highest ratios yet though.
Posted 2 years ago # -
22/36/bash with an 11/28 block... it's not quite right though..
might go to 1x9 with a 32 up front.. hmmmmmmmm.
Posted 2 years ago #
Topic Closed
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