9 Speed Tiagra 11-32

[Peteaud]

The 2013 specialiized Roubaix has a 11-32 cassette with Sora Mech.

So why cant my giant have the same, or better?

I live in a hilly area so the 11-27 (was 11-25) cassette is a bit of a pain.

Well, keeping the Tiagra 9 speed rear mech would it be possible to fit an 11-32 cassette?

With a bit of old chain and a cheap 11-32 cassette i now have it.

Standard 9 speed Tiagra Rear Mech, 50/34 front rings and all works well.

(going to change the cassette for a XT Version when funds allow.)

 

[the_mikey]

The rear mech determines the lowest gear possible by it's ability to physically fit under the biggest ring on the cassette, and it's ability to take up the chain slack for the whole range of gears, if it can do this it'll work. I have a short cage 9-speed tiagra rear mech and the biggest ring it'll take on the rear cassette is a 28T (in the manual it says 27T) and some attention is needed to chain length, too long or too short and it will cause problems.

 

[Peteaud]

The rear mech determines the lowest gear possible by it's ability to physically fit under the biggest ring on the cassette, and it's ability to take up the chain slack for the whole range of gears, if it can do this it'll work. I have a short cage 9-speed tiagra rear mech and the biggest ring it'll take on the rear cassette is a 28T (in the manual it says 27T)

The pic shows the 32 tooth cassette all fitted

 

[the_mikey]

Crikey

 

[mcshroom]

What does the mech look like when you engage bottom gear though (largest cog)?

 

[Peteaud]

Didnt take a pic, went out on it instead, and all works well.

 

[Rob3rt]

What are you climbing? Walls?

 

[Peteaud]

What are you climbing? Walls?

yes and i was bored.

 

[Peteaud]

FRAME FACT 8r carbon, FACT TM construction, 1-1/8" to 1-3/8" HT, Zertz, threaded BB
FORK FACT carbon full monocoque, Zertz
HEADSET 1-1/8" upper and 1-3/8" lower Cr-Mo cartridge bearings, w/ 20mm cone spacer and 20mm of spacers
STEM Specialized Elite-Set, 3D-forged alloy, 4-position adjustable, 4-bolt 31.8mm clamp
HANDLEBARS Specialized Comp, alloy, standard drop
TAPE Specialized Roubaix tape w/ 2.5 gel pads
FRONT BRAKE Axis DC 1.0
REAR BRAKE Axis DC 1.0
FRONT DERAILLEUR New Shimano Sora, braze-on
REAR DERAILLEUR New Shimano Sora
SHIFT LEVERS New Shimano Sora STI, 9-speed
CASSETTE Shimano CS-HG-50, 9-speed, 11-32
CHAIN KMC X9, 9-speed, nickel plate, w/ reusable Missing Link
CRANKSET New Shimano Sora compact
CHAINRINGS 50/34
BOTTOM BRACKET Shimano Sora
PEDALS Nylon flat test ride, loose ball, w/ reflectors
FRONT WHEEL DT Axis 1.0
REAR WHEEL DT Axis 1.0
FRONT TYRE Specialized Espoir Sport, double BlackBelt, 60TPI, wire bead, 700x23c
REAR TYRE Specialized Espoir Sport, double BlackBelt, 60TPI, wire bead, 700x23c
INNER TUBES Lightweight, presta
SADDLE BodyGeometry Riva Road, Cr-Mo rails
SEATPOST Specialized Comp, FACT carbon, 27.2mm









Spec of the 18 speed spesh

 

[Nearly there]

Does the jump in gears feel massive? what's the ratio?Looking at a lot of new bikes Felt Spesh etc they all seem to be putting bigger cassettes on.

 

[mcshroom]

I know that 2013 equipment is being made to fit up to 32t, instead of the standard tourer solution of a mtb rear mech which doesn't work with the new 10sp mtb rear mechs (different cable pull)

 

[Peteaud]

Does the jump in gears feel massive? what's the ratio?Looking at a lot of new bikes Felt Spesh etc they all seem to be putting bigger cassettes on.

Will try to get out for a good long ride at the weekend, but the short ride was fine. My intention was to runa 11-30 but these cassettes are not the easily available. I am not into racing as such so the jumps dont feel too bad, but i am used to riding moutain bikes so maybe that helps.

The 2013 Specialized Roubaix has 11-32 with sora (9 speed), The 2012 ?Giant defy 2 came with 11-30 Tiagra (10 speed) and i live in a hilly area so though i would have a play. The alternative would be an XT short cage RD but if the Tiagra works well i will leave it on.

 

[Rob3rt]

Does the jump in gears feel massive? what's the ratio?Looking at a lot of new bikes Felt Spesh etc they all seem to be putting bigger cassettes on.

I don't understand why! Maybe it is the Wiggo effect, they know lots of new people will be taking up cycling and will want some easier gears? I ride a compact with a 12-25 cassette and can not really see the need for a larger gear than 25 for all but the steepest of hills! (On a laden tourer yes, on a race bike, fark no!)

 

[Peteaud]

I know that 2013 equipment is being made to fit up to 32t, instead of the standard tourer solution of a mtb rear mech which doesn't work with the new 10sp mtb rear mechs (different cable pull)

True, but what got me thinking was the 2013 Spesh 9 spped sora ?
http://www.edinburghbicycle.com/products/specialized-roubaix-13

 

[mcshroom]

That's what I meant sorry. The 2013 road groups are being expanded to 32t: -

http://www.bikeradar.com/news/article/shimano-sora-and-tourney-2013-first-look-33204/