Just posting on here to gather one location for the interest in a Track (144BCD + chainline specifics).

Things that i'd like to see 'considered'. What bottom bracket style? - External (SRAM Omnium does this), - Square Taper (Sugino 75, Grand Mighty, Campagnolo, etc) or - Octalink (Shimano Dura-Ace Track and SRM Track).

External - Easiest to use install, no adjustment necessary - SRAM who seem to be big partner with Quarq endorse External BB for track with the Omnium. Highest bearing drag, though can be addressed with good quality ceramic bearings and accurate clearance adjustment with the crank arms. External BB like Chris King allows for easy change of grease.

Square Taper - Perhaps the lowest bearing/seal drag. Hardest to care for perhaps.

Octalink - Proprietry interface, more likely to pick the ISIS standard. Not highly used, nor highly regarded. Perhaps the worst pick of the bunch.

Crank arms - Carbon, Alloy?

Carbon - Existing 3 piece designs like SRAM S900/S950 make part availability best probably. Though perhaps not common on high end track bikes.

Alloy - Sugino 75/Grand Mighty, Dura-Ace, Campagnolo and Omnium are the 'reference' cranks for track. At the recent Track World Cup held the other day in Melbourne, Australia, if people weren't running SRM's they were almost exclusively on SRAM Omnium cranksets, very few Campag, DA and Sugino Grand Mighty sets. However these are all integrated spider designs.

Slope Correction for ring designs.

Rings are constantly changed at track side, along with rear cogs. Adjusting these two together riders will chase 1 - 2 gear inch changes to pick the right gears for their legs and event. How do you cater for this. Assume the rider has the same ring design for all their rings, the adjustment of slope may minimally change? However many riders will have different types, and a sizable investment in rings already. DA, Sugino Zen, etc rings are not cheap at all. The user will have to be able to calibrate the device to their own rings. Process is manageable and repeatable.

Sooooo.... as a track racer that wants power and a roadie that rides with power (SRM Dura-Ace Pro), i'm currently chasing a second hand SRM Track, and not willing to pick the Wheelbuilder.com Powertap Track Hub (already got an investment in a Zipp Disc with track axle). Cinqo track options are what i'm tracking :) It had better be stiff, and fast broadcast of data - ideally, be broadcasting data without the pedals turning to something like a Qollector to measure standing starts.

The other option which allows me to keep my investment in my pricey-ish SRAM Omnium cranks are the Metri-Gear Vector pedals. I'm keeping a close eye on those!

Post ya pista thoughts here! :)

It turns out the slope does not need correction for different rings on the prototype track units we have built. The spider is built stiffer around the ring, so the chainring has much less influence on the slope. So I expect you will be able to swap the chainring without recalibration or slope adjustment.

One thing I would like to try is building an adapter ring to convert a 110bcd CinQo up to a 144bcd. This would allow any of our compact models to be used in the track (with the current crank selections).

Our main challenge with the track CinQos has been finding a good crankset to work with. We have tried to avoid building our own cranks as we already have plenty of projects on our plate.

Jim

Any comments about the broadcasting of data while the cadence is zero for specific track applications?

Many thanks for the open and prompt responses Jim. This is a great medium.

Wondering with such close alignment with SRAM they would be willing to do a Alloy Omnium crankset that would be compatible with the Quarq. It would certainly be the right product for both of you. Just a matter if the production volume/cost is worth it. SRM seem to make it work.

You are probably snowed under with volunteers for beta testers, but if you want to send one to Australia for more 'testing' you have my mail address ;)

No hangups, the CinQo and Edge 705 are fine on a fixie. The CinQo only transmits positive torque, any negative torque displays as zero. For the best zero offset stability, use a beefy chainring like a solid disc TT style ring.

$250 for arms-only for a JIS square taper crank? Ouch... pass...

parawolf, I've got something in the works that you may be interested by.

I too would love to have power on my track bike without the hassle of batteries the other track powermeter uses. My cane creeks reverse nipple design dont like PT's either.

An adaptor plate style of track quarq would be interesting. Then I could use it during track season, then put it on my training road bike in the off season.

I hope to have some interesting photos/information to report next week. :)

We talked with Andy as he was building the adapter ring. The ring will work nicely for calibration. We will calibrate the CinQo with the ring attached. Because the adapter ring is so stiff, you will be able to swap the rings to anything you want with out affecting the calibration. But if you pull off the adapter ring and put on 50/34 road rings, you will have a different calibration.

Jim,

Looking at buying a powermeter for fixed wheel Time Trials and have seen your post regarding "no hang ups using a standard one on fixed" I'd be pairing it with a garmin 500 but just wondered what the calibration proceedure would be for this to ensure an accurate zero offset with the fixed drive chain, also I wouldn't require an inner ring, If I sent a solid outer ring could this set up then be calibrated as a single ring set up... thanks in advance

We're still not sure when we'll have a track CinQo ready. We've been waiting for some acceptable cranks with a removable spider that the track folks like. Perhaps the Rotor 3D track cranks will work when they are available.

We just get a set of 144 BCD Rotor 3D track cranks from Kervin at Rotor USA and they look like we should be able to make a CinQo for them. Hopefully we'll have time to machine up a prototype for them in the next month or so.

So for now, that looks like the avenue we'll be taking. It's just a matter of time for us to fit in the prototyping with the production of all our road models right now.

This all sounds really cool,

So can i just clarify something Jim,

If i was the owner of a road bike with a CinQo on 144BCD SRAM 172.5 cranks 53/39 setup and i also owned a track bike with SRAM omnium cranks 167 144BCD i could potentially swap out my CinQo on my road to my track bike with some form of adaptor plate that is in development, to eliminate calibration issues ?. Or is not an option and current owners of road units need to purchase track ones as well? or am i confused?.

I'm betting with the buyout of Quarq by SRAM, the 'white knight' of the Rotor 3D which is for track applications, and a 144BCD CinQo is very much on the back burner for another few months; unless SRAM put some engineering effort into this concept.

Given the comment of "Non-SRAM powermeters will be phased out over time" and "The development and release schedule for any other powermeters is unknown" means that we won't see a Rotor 3d Track.

Since SRAM have the 'reference' product track product in the Omnium; i'd love to see something made available. However i'm no longer holding my breath for it....

Hi, been a while, are there any updates on the track cinqo? anyone using the track adaptor plate ??