Fat Bike: double at the front or single ring?
I have a Singular Puffin on the way (yay!) and am gradually building up what I need to run it.
I have an x5 crankset with 2 rings on it – 36 and 22. I’m running 34t single rings on my 29 and 26 bikes and find hills around here ok (South Downs around Brighton). Although in reality I’ll probably treat it as a ‘play in the woods’ type bike rather than xc mile muncher.
I’m not sure whether to ditch the two chain rings and go for another single ring setup with, say, a 32t chain ring or get shifters and stuff to use a double at the front. How much extra effort do fat bikes need when climbing due to wheel/tyre weight or is it really only overall bike weight that matters?
If I do go for double at the front I’ll be running a 9 speed cassette, chain and rear shifter (as I have lots of these already). Will a 2×10 front shifter and mech work ok with that setup?
I’m guessing I can’t use a 3×9 front shifter with a 2×10 chainset?Posted 4 years agoscudMember
Has anyone tried running 1 x 10 with one of the adaptors on cassette giving a 40 or 42t high on cassette?
Thought it may be a good solution and allow a better chainline round the rear tyre?
I am currently building up a Mukluk and keep reading of problems with rear tyre clearance in some gear combos?
Anyone know where SRAM X5 cranks can be purchased from for 100mm BB?Posted 4 years agomonkeypSubscriber
I run a 32 front with a 9 speed 12-36 (?) on the rear which is fine mostly, however, I am toying with getting a Oneup converter or as a minimum a 30t front. The current setup is OK, but the bike makes you want to ride silly stuff, so the lower gears would allow me to do this a bit easier.
I don’t think weight is the issue to be honest, it is just the things you want to ride ‘because you can’ need a lower gear and that is why fat bikes are so much fun!Posted 4 years agotroutSubscriber
Here is my experience on a Fatty
arrived march last year with 1×10 and was told by a few folks that you dont need a granny ring .
so rode it until end of august with not too many issues until a group ride in swaledale and really struggled on the ups
This was 1 week before I was due to take it to the Pyrenees so had a panic purchase of a double front and shifter and fitted just in time .
The granny does not get a lot of use but it sure is nice to have it .
I too have a Puffin on the way and will be fitting the single chainset from the fatty and hopefully one of those 42 rear sprocketsPosted 4 years agoboltonjonSubscriber
I’ve got a Puffin on the way and intend to go 1 x 10 like my other bikes
Living near Swinley has limited big climbs, but i can do everything around here with a 30 x 36
It is a bit more challenging when you go to some proper hills – but at least you’ll work hard for it! 🙂
Pretty good deal here on a Raceface crank – £103Posted 4 years ago
The next one will have a Rohloff.
You may be limited in choice because the Rohloff is only available with 135mm spacing. I know 9:Zero:7 do make one frame with the right spacing.Posted 4 years ago
It seems a pity the hubs not compatible with most frames as it seems the perfect combination for filthy winter conditions.JoeGSubscriber
Fatty owner for over a year here. I went 2×10 right from the start. 24-36-bash crank and 11-36 cassette. It was the right call for me.
I’m on the big ring most of the time when riding regular singletrack. The granny is nice for a bailout on very steep climbs or for tired legs. The amount of grip is amazing and you what you can climb will surprise you!
Granny gets used almost all of the time when riding in snow, though.Posted 4 years ago
So you are going to have a Rohloff equipped custom Shand – It’s easy to go off people you know. 🙂
Are you going for a frame that’ll run a belt if you want to go that way in the future?And what about front hub spacing? My fantasy fat Shand would have to have 100mm for my dynamo hub.Posted 4 years ago
Are you going for a frame that’ll run a belt if you want to go that way in the future?And what about front hub spacing? My fantasy fat Shand would have to have 100mm for my dynamo hub.
Belt not possible as everything is so tight with the 4.8 tyre in the back along with the short stays.Posted 4 years ago
Needs a 13T offset on the hub to allow the chainring to also be small and give cstay clearance. 28T ring on the wide Middleburn RS8’s.
I’m not sold on the benefits of a belt anyway for off road use.
Front fork will be OO carbon when it appears.
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