Trek has 3 options for the topper that moves the stock bars either behind or ahead of the front of the tower position. There’s then a fair range of adjustment in terms of bar/pad position.
So in my case with mid topper and the stock (and now FastTT) in a rearward position then, no, certainly no lack of reach for me. In fact I’ve had to go forward a touch as the min reach on Fast TT is longer than I had on the std setup. You can see that in all the stock, the elbow pads are behind the towers by a fair bit.
So it sounds as if what you are proposing is going to increase the moment from the front, and that’s going to add stress to the bolt at the back of the towers primarily. Those a designed for predominantly compressive loads.
Trek do sell the bars separately.
Then it seems a centered wing as my picture above will be fine on load same as my current system and later to add more reach will need to do additional fatigue testing
Just note that your adapter above don’t have any side bracing. The stock system is linked at the top. With it low like you show above then I guess you wouldn’t be worried, but as the tower height increases then there’s not a lot providing strength to stop them folding inwards.
Please note, not picking faults, just communicating what I’d be concerned about if I was thinking of a swap.
This was one of my problems with Trek SC in small size. The topper that comes is the near and in my country they didn’t have the spare part, so I chose directly to change the entire cockpit with the fasttt kit.
Ok,I have a question. If I can get the whole system, ie, adapter, my spacers(80 mm of stack), bta bridge, 22.2 clamp all for around 300 or less shipped. would that be reasonable to many?
And when you ordered your bike, did it comem with all the spacers or did you need to order as needed?
$300 sounds reasonable to me, if everything (incl. different length bolts) are included.
When you order a new SC, you get one set of tower toppers of your choice (near/mid/far), one set of towers (35mm is the std, but you can customize when ordering a P1). In addition you get a set of +7°, a set of -7° wedge spacers, and two sets of 5mm spacers to fine tune. That’s it. If you want to customize further, you’d need to order the parts through Trek, unless you have a good relationship with your Trek store and they are willing to swap out towers (or toppers), and keep your old ones. Trek stores around here usually keep a “fit kit” stocked, that contains every part in every variation.
Note that the bolts are additional to the individual (ie left and right are separate orders).
With my P1 then I deliberately chose the frame size to be midrange with the towers/toppers to keep the cost down if I did change position.
I just upgraded to a 2024 speed concept from the prior generation.
Two questions:
I have the high basebar. Other than it looking dorky, is there any known aerodynamic benefit to moving to the low basebar? This thing looks like some sort of X-fighter.
Is there any affordable option (I don’t want to spend the money on an aftermarket stockpot setup) to decrease aerobar width? I was really narrow on my prior bike and I got really used to it. I’m uncomfortably wide on the new generation setup.
I haven’t seen any aero test that shows the different between the base bars. But every trek pro is on the low rise base bar FWIW.
You will need an aftermarket solution to bring the extensions in closer. The best solution is probably the new tririg adapter plate which would allow you to run the ultimate scope SL or any round extension. The round extension option is probably the cheapest and gives you plenty of adjustment capability.
I did read/see some info that suggested that there wasn’t any significant aero differences in the base height - they tested and it was all within the margin of error stuff. And the cost of the base bar swap is not insignificant.
Re the width, funny thing is I found the stock put me with hands touching - long fingers. But having just gone to FastTT bars then whilst I was comfortable with them at the same sort of width I’ve just had to move them wider for control (it’s a me thing, there are reasons). Over time may bring them back in.
That said, I’m wondering if I really should have just got some longer cups for the stock bars. In my case I was running the Trek BTA bottle and that’s probably the reason there’s no option to move the bars narrower on stock setup.
