Is there a spec where the 51 speedshop beats the Alpha?

My read is, alpha is:

1. lower min stack, greater adjustment range.
2. Narrower pad spacing (but less adjustment).
3. More tilt range.
5. better airfoil (even if 6:1 isn't "much" better, its still "better").
6. di2 compatible (versus NOT).

The only spec where 51speed seems to win is WIDE pads. So, if you need really wide elbows (??!) go with 51speed, else...Alpha. Also, the 51speedshop uses spacers, instead of the sliding post. So, stack adjustments on the 51speed will be fiddly at a "venue" such as field testing. Again, that might not be a HUGE advantage...but, if you are out Chung'ing that's a nice perk.

Looks like OP was comparing against Alpha X, not Alpha One. Only the latter has the Monopost. They are also very different in terms of price. Just want to point that out for OP or any others reading this thread.

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TriRig.com

Thanks. My bad.

I skipped right over the "X", and assumed the OP was comparing both monopost products. I did check the price of both monopost products (but, not the X for the above reason), but didn't mention it since its about the same for either.

So, monopost issue notwithstanding....the X is also $300+ cheaper (based on current website pricing).

Don’t forget to add that either TriRig aero bar would be compatible with the Delta cover if you ever were to consider cleaning things up further. Assuming you run an Omega brake.

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Adam Feigh
Pianko Law, Speed Hound, Castelli, Sailfish, Base
Feighathlon.com

I am, thanks. Is my math on the Alpha X minimum pad width (measured from pad centers) correct?

Looks to be correct! The online fit guides will give you the best answers :-)

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TriRig.com

What did you end up choosing?

The 51 Speed Shop bar and their FSM extensions. Getting it installed on the bike in the next few weeks, but the product looks and feels awesome in the box

Kind of hoping to hijack this thread now that OP got their new cockpit, but I'm also looking at both.

On the 10th I'll be heading back to my fitter to fine-tune my fit on my new P2, but since that cockpit is garbage IMO and I want to upgrade to Di2, I'm looking at one of the two (51 speedshop or TriRig Alpha One) and I guess I was wondering if anybody had any thoughts on what they would do assuming both can comfortable accommodate my fit.

Specifically, what is the build quality like on both of them, and how do they integrate with Di2?

Thanks in advance!

There's not a ton of extra space, but with no modding and no jamming, we have a 5 port junction box in the stem of the Alpha One on Summer's bike. The Alpha One also provides stack adjustment without being limited to 5mm increments like the 51SS and provides 0-17.5 degrees of tilt vs the 0-12 degrees on the 51SS. Now obviously I'm biased, but I would say go for the alpha one for the previously stated reason but also so you can throw a Delta cover on it if you ever wanted to. Would definitely clean up that front end even more.

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Benjamin Deal - Professional - Instagram - TriRig - Lodi Cyclery
Deals on Wheels - Results, schedule, videos, sponsors

Have you considered a Red Crown Monarch bar? They are the same 51 Speedshop mono bar extension mount but their own base bar with DI2 junction and charger port built in.

http://redcrowncycling.com/...-integrated-aerobar/

I have not seen the speed shop up close to compare

I received the Tririg and put it on myself. It was very easy fr me and I don’t do much wrenching. For example I would never try doing bottom brackets, I pay to have things like that done

I also out the delta on it fits nicely

I have approx 10,000 miles on it and still very happy with the purchase. Easy to fiddle with to change angle etc

As for DI2 I don’t know as I have manual shifters

You will have to post some pictures once you have it mounted.