Anyone have any ideas where I might be able to get a round 130bcd 2x 55/42 or 56/42 chainring setup for 11spd? Looks like Rotor only makes ovals now in 130, and I already have their oval 55/42. I know Aerocoach makes carbon rings, but I haven’t had much success with the durability of their 1x rings, so I really doubt having to shift the front is going to be any better.
Specialties TA do some.
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Praxis offers 54/42 and 56/42 130BCD round TT rings compatible with 10 and 11s. No affiliation, but I run their 48/36 rings on my hill climb bike and have the TT rings to go on an 11s Shiv for next season.
I thought they did a 55t as well but not currently on the web page.
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What’re your thoughts on this:
I must admit I do not understand the product. Never have I ever seen double discs on a TT bike be used anywhere.
Edit - I did not realise this as a front disc. I thought the original double disc reference was to the shape. So ignore my comments about that being used in GTs. I was referring to the rear
@Aeroiseverything I am sure I have seen it used in the TTs in grand tours and world champs. It has been around for a while. Thought it was Ineos but may be mistaken. Definitely seen it in use, as also Aerocoach’s Aeox front wheel because it caused a controversy with a “Fairing” between the fork and the front wheel hub.
As their website says https://www.aero-coach.co.uk/store/AeroCoach-AEOX®-ULTRA-carbon-road-disc-wheel-p201821567
UCI LEGALITY
“The AEOX® disc wheel is fully UCI legal and has been raced in the Tour de France, Giro D’Italia, Vuelta a España and multiple elite World Championships.”
Aerocoach are pretty hot on aero testing, so whether it looks right or not, and whether you understand it or not, it must work. Nearly bought one myself.
You realize this is a front disc wheel for road use?
I can’t think of the last time I have seen a front disc wheel used in a major race…honestly the most recent once I can recall was Fignon in the 89 TdF, although I am sure there were others around the same time frame.
My understanding was that the UCI had banned front discs form the road and they were confined to track events only.
I obviously have never tried a front disc, but I am even surprised it is legal and exists.
If it was UCI legal (which it apparently is), why wouldn’t more riders use it?
They say up to 13kph of wind speed (8knots) it is safe to use. Pretty sure it was less wind than that during the European champs for example.
Does anyone use the Garmin Varia with 1/4 mount on TT’s ? I had to use it on Sunday as a back up for the usual light that failed. Looking at the pictures of the weekend I am quite impressed how much more visible it is and the beeping didn’t actually drive me mad. I’m looking at a saddle mount light but I have concerns over the robustness of the 1/4 turn.
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I’m pretty certain front discs are not UCI legal actually… I’m really not sure what the application of this wheel is, as I haven’t seen a front disc anywhere recently outside of track racing.
Edit: I just noticed this on their page “The AEOX® front disc wheel is fully UCI legal. It is not legal for use in triathlon or CTT (UK time trial) events.”
I didn’t think they were UCI legal, but I doubt they’d make that claim without being 100% certain.
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My coach (who is affiliated with AC) also told me, that a few pros at the worlds were equipped with the wheel, but decided not to use them (maybe weather).
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I use it on my training rides on the TT bike. It actually stays in place quite well.
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I use it training too. It mostly stays in place but it dosen’t like the square back of my aero post and eventually it’ll move to one side of it. Its never actually detached though 
I had a quick scan of the list of approved wheels and didn’t see any aero coach wheels on it. Any idea what brand they have the Titan approved under?
For whatever reason they are not on there.
There is not a single 100mm deep wheel on the list (which the AEOX Titan is, that is frequently being used by Ineos, Jumbo and Fenix).
So I have a TT coming up, and not too sure how to approach it, its roughly 20km (10km out and back) with a gradual drag and short pinch, followed by a descent, then back up the climb, and gradual descent most of the way to the finish. This is a segment of the course but its backwards, starts at this segments mid point heads south, then back north - Gandchester 20 km Hilly TT | Strava Ride Segment in Grandchester, Queensland, Australia
This is the climb - Lot 226 Jackson Rd Climb | Strava Ride Segment in Grandchester, QLD, Australia
I feel like the TT bike will be quicker overall due to the return leg after the climb. Lots of time to be gained at high speed there. But the climb will kill me as my TT bike is 1x w a 54t. Currently running 11-30 on the back, but can throw a 32 on there. I suspect ill still be grinding sub 60rpm to get up in places. A smaller chainring will likely spin out on the return leg
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Given the top of the leaderboard is all in the 10-11mph range, I would not advise a 1x54 on that climb even with a 32 out back. Anyway you could easily swap to 2x?
Nope, not a chance. Id have to source a shifter, run cabling (not easy on my frame), source a derailleur, source chainrings, chainring bolts, definitely not worth the hassle for 1 TT. Ill grind if I need 
AFAIK the climb has never been done full gas on a short event, certainly not as part of a TT.
Ah ok, that might make things a little better. Depending on your weight/power output at say 15-16mph, a 54/32 combo would be doable, though you’d be grinding a bit.
I think ill do some hill training on the TT, work out my limits and how hard I can go on the climb without blowing up for the return 7-8km
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