1 X 10 Gearing set up

paul.skibum

Thinking of swapping my HT to a 10 spd set up - with a 11-36 cassette and a single ring on the front.

Questions are: What size front ring do people use - I am thinking a 32 to start off and see how I get on with that but would be interested to know what others use and where they ride! What chainring would anyone recommend - makes - looked at the Shimano Saint single ring with bash guard.

I will probably fit a basic chain device (superstar) as it seems sensible to make a single ring set up secure too.

While I am at it it would be great to up grade the fork, wheels and finishing kit and get the frame resprayed so my final question is - can anyone lend me some money!

spongtastic

running a 1x9 with a 34t FSA DH ring , £14.41 from ukbikesdepot.com, up front and a MRP 1.x. It's quite flat round here so don't need a 32t. Also haven't bothered with a bash.
The superstar chain device is almost identical to the MRP one, but doesn't have the stoopid alu bolts that the factory round off for you.

bluechair84

I have a double up front, and find that I'm spinning out the 36tooth on long descents pretty easily. I use the granny from time to tiem because I'm a pussy.
It depends on what terrain you're riding. If you don't go down to the granny very often I'd suggest a 36 otherwise you won't get the top end speed.

njee20

I was thinking of doing it for racing next year, with either a 34 or 36. Depends on the bike and the legs as much as anything!

paul.skibum

Are you spinning out the 36t on the 11t at the rear though? My FS has a double set up at the front (22-32) and an 11-34 at the rear which I used in the Alps and didnt find I was spinning out on the big front and small rear except on fire roads by which time I was going plenty quick enough for my linking!

My HT currently has a 26-36-48 chainset and to keep the chain taight and stop it skipping at Afan this weekend I was running it on the big cog front and say the 3rd largest rear which left the chainline less than ideal but reduced slap - I found generally that this was pedallable still as well except when really motoring. On the ups I was dropping to the small but running on the 2nd largest at the rear.

So my thinking (without doing any maths) was that a 32 or 34 single ring chainset and a 11-36 rear 9 or 10 spd would be a good compromise - I can always play with the chainring size but if I can get it right first time out that'd be good!

njee20

This is good if you want to work out which gears you'll lose.

paul.skibum

:? Njee20 that may help you but its been 20+ years since i last did physics and that tells me nothing - what's a Gain Ratio? For example!

njee20

It's simply the ratio, so 44:11 is 4:1.

Do it by MPH at a given speed if that's easier, it's just a comparison so you can see that (for example) if you had a 36 you're top gear would be equivalent to 44/12 or whatever!

Steve_F

I managed to destroy a couple of rear mechs/hangers when in the middle ring and the big (climbing) gear at the back. Not sure what size these are but there is a big strain on the chain in that gear which gave up when the suspension took a quick impact (usually something like going into a ditch/hole and trying to power out the other side).

Might be worth considering if it's a FS with a single ring.....

njee20

No particular reason for that frankly, if you were big/big I could understand it, but that should be fine.

paul.skibum

I suppose it depends how taught your chainline is - my query is re a HT in any case.

I know I rarely use 48 x 11 (down hill tarmac maybe) probably 48 x 3rd or 4th from smallest cog (whatever size that is - 15/17t I guess) when cranking on flat and 48 x 5th or 6th (20/23?) for downs and undulations local to me Id go to 26 x 34 for long steep climbs spinning up but generally can make it round most things on the 36 at present.

So current 26/34 = 0.765
but the 9 spd or 10 spd would be say 32/36 = 0.89

and at top 32/11 = 2.91 vs a current set up of 48/11 = 4.36

See that means nothing to me! I guess I stick a 34t cog on the front and try riding in that gear alone for a bit!

njee20

Right... if you have an 11-34 the ratios are something like:

11-13-15-17-20-23-26-30-34

48/17 = 2.82

So... if you had a 32t single ring it would be roughly equivalent to your current big ring, 4th from bottom gear. See what I mean?

paul.skibum

So a 32t front 11t rear is equivelant to a 48t on 17t in that they both equate to 2.82 or thereabouts ratio right? and a 32t to a 36t on the cassette is going to be harder work than a 26t granny to a 34t cassette by 0.89 to 0.76 but I tooled up Whites Level in granny and 2nd or 3rd biggest which equates to 0.87/1.0 give or take so all things being equal a single front ring and a 11-36 rear cassette would get me up the same hill.

Right on - cheers Njee. Now I just need some money.......