First, the complete bike is a Cervelo S5 2026 Dura-ace.
Pedals: Dura-ace Clipless Pedals
Water bottle cage: Elite Leggero carbon (new model, overseas order because the domestic importer has no stock)
Saddle bag: Post carry
Since the Cervelo seatpost is aero-shaped rather than round or D-cut, regular saddle bags have velcro bands in the middle of the seatpost
for mounting, which is not easy (I also tried an Evoc saddle bag, but wasn't satisfied with the result.)
It was smaller than expected, which was a bit surprising
TPU tube x1
Campagnolo tire lever x1
Silca mini tool x1
Emergency USB-C to USB-C short cable for smartphone charging x1
And
even the mini electric pump fits perfectly inside.
Most importantly, the bag doesn't protrude outside the saddle, and the width is narrow so the inside of the thigh won't rub during pedaling.
It's bucket-type so it has a simpler fastening structure than velcro bands, which I like.
The water bottle has a 550ml capacity and weighs 65g per unit, I'm told.
It's the Abloc Arrive S model.
Specialized Purist is about 79g at 550ml, and Elite Fly products are said to be around 51-54g
So it's in the middle range. The Cervelo-Jumbo Visma team uses Tacx water bottles, and you might wonder if using a Tacx cage + Tacx water bottle looks good together
but personally I don't trust Tacx water bottles because of their inherent problems.
Actually, while thinking about the saddle bag above, I was considering buying that Nanoworx 3D printing product I saw before, but it seemed like overkill
so I'm putting it on hold.
Apart from that, while considering the Garmin Varia 515 mount, I found that a Danish company called TONS makes products with 3D printers
so I looked it up
There's a domestic importer for TONS products, but it seems they're not taking orders or the payment process won't proceed, so
for now, I've ordered a separate Varia mount for the Cervelo S5 from AliExpress.
Compared to the round seatpost era, as seatpost specifications and shapes have become more diverse, installing accessories has become more difficult
and the mounting method has changed to attaching separate adapters to the back of the saddle or mounting in different ways
so more adapters for those appear, and there are companies making lightweight, compatible products using 3D printers as well as triple mounts
(light, speedometer, action cam) that the original manufacturer doesn't provide—though of course, whether maximum load capacity testing has been done for each product is a separate matter—
the niche market is quite chaotic.
As aftermarket accessories increase, there's concern about cases of handlebar damage due to excess weight and overload
and especially as integrated handlebars have become common, I often see noise issues from various companies using complete bike + aftermarket handlebar compatibility adapters.
FSA ACR headset spacers at least have a wider compatibility range, but other handlebars don't quite match the frame headset spacer shape
and I notice noise and play issues, etc. It seems the manufacturers didn't have these in mind from the beginning
so there appear to be some compatibility issues with spacers or adapters between the frame and handlebar.
At times like this, I think it was more convenient when we just used round circular spacers like in the old days, but well...that's how it is.
