- News
- Reviews
- Bikes
- Accessories
- Accessories - misc
- Computer mounts
- Bags
- Bar ends
- Bike bags & cases
- Bottle cages
- Bottles
- Cameras
- Car racks
- Child seats
- Computers
- Glasses
- GPS units
- Helmets
- Lights - front
- Lights - rear
- Lights - sets
- Locks
- Mirrors
- Mudguards
- Racks
- Pumps & CO2 inflators
- Puncture kits
- Reflectives
- Smart watches
- Stands and racks
- Trailers
- Clothing
- Components
- Bar tape & grips
- Bottom brackets
- Brake & gear cables
- Brake & STI levers
- Brake pads & spares
- Brakes
- Cassettes & freewheels
- Chains
- Chainsets & chainrings
- Derailleurs - front
- Derailleurs - rear
- Forks
- Gear levers & shifters
- Groupsets
- Handlebars & extensions
- Headsets
- Hubs
- Inner tubes
- Pedals
- Quick releases & skewers
- Saddles
- Seatposts
- Stems
- Wheels
- Tyres
- Health, fitness and nutrition
- Tools and workshop
- Miscellaneous
- Buyers Guides
- Features
- Forum
- Recommends
- Podcast
forum
Junior gears on new shimano 12-speed groupsets
I was wondering how to get the gears of the new groupsets from shimano (12-speed Ultegra or Dura Ace) to fit inside the junior regulation of gear rollout. For example the hardest gear cannot be more than 52-14.
But I can’t find any 12-speed cassettes that have the smallest cog 14. Any suggestions?
Thank you
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.
Latest Forum Topics
Latest Comments
- john_smith 2 min 46 sec ago
Your assumptions about my "beliefs" must also based on the results of your mathematical models. I've never bought bike parts because of what they...
- TheBillder 13 min 3 sec ago
Bottle dynamos were utterly terrible back in the old days. Kit like the Sanyo Dynapower (tyre driven but on the tread rather than sidewall) was a...
- wtjs 43 min 41 sec ago
They called me later that evening to say the driver was apologetic and would be driving according to the Highway Code of allowing 1.5m when passing...
- wtjs 47 min 6 sec ago
In its email, the force added: “Your help in taking the time to make us aware of this matter is greatly appreciated and will improve the safety on...
- carefulrider 21 min 31 sec ago
The quote from the appeal court judgement is not saying that Auriol Grey did anything wrong. That is the essence of the judgement. Her actions...
- Hirsute 3 hours 3 min ago
In theory, Colchester is getting one but I expect the haters will be out to stop it. There are a number of regulars who just say "That would not...
- Hirsute 3 hours 6 min ago
Must be a touch of the sun....
- don simon fbpe 3 hours 56 min ago
RIP brother.
- wtjs 4 hours 28 min ago
BBC R4 on Broadcasting House 9:45 papers segment happily having another "but cycles" hitting most of the wrong notes...
- Rendel Harris 4 hours 39 min ago
According to GOV.UK the average wait nationally is now down to 15 weeks, from a peak of 20 in August 2023 caused by a backlog from Covid and test...
Add new comment
7 comments
If racing abroad, and they won't let you block off only via the limit screws, then an alternative is to bench grind the teeth off the higher gear gogs!
Lol, someone's a lucky boy / girl....
The only 12-speed junior cassette I know about is a Campagnolo model made by Miche. I'm pretty sure UK comms allow you to simply lockout the mech at the 14T, but right now, if you have to have the full spread available, then smaller chainrings would be the way to go, though fitting a 40T chainring is likely to leave the lad/lass struggling on the hills.
A friend of mine used a campagnolo 12 speed cassette with the new ultegra and said it works just fine.
Do you think that's ok?
SRAM makes a 10-36 12sp cassette. I've no idea if the spacing's compatible, but with a single 37-tooth chainring that would yield a legal gear range. I'd be amazed if the 12sp Ultegra and Dura-Ace derailleurs couldn't handle it, given how cautious Shimano always is about the nominal capability of their derailleurs.
They'd still potentially have a 40/34 (31-inch) low gear, which is lower than the 36/30 (32-inch) I'd expect someone with a double (52/36) chainset to use for racing, but I don't race so may very well be talking out of my arse.
Fit a 40-tooth single chainring?