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Messages - jfcb

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1
Component Deals & Selection / Re: new iGS800 Bike GPS Computer
« on: September 07, 2026, 09:39:57 AM »
Happy user of the iGS800.
I'm now using it two years and its a great substitute for my garmin 840.
Originally navigation was poor, but since they did a great software update one and a half year ago, it's perfect. The only difficulty I notice is the scale of the map is different compared to my garmin which makes it a bit more difficult to navigate offroad. Likely I can modify this setting to make them have the same scale, but I'm too lazy. 
Uploading and using routes with the app is also way faster than with Garmin.

Concerning functions, it has all what you need including the colorfull widgets and a climbPro feature (which might be called differently).
So far I have no issues with the hardware: the battery life is still superb (and long lasting) and the screen is still as good as new. Also the screen does not fade at the edges (which my previous garmins started to do after a couple of years).

Customer support: For the EU consumers: BikeInn.com also sells the computer at a competitive price, so if you want better customer service or warranty, this might be a good solution.

In short: a great substitute and cheaper alternative than the overprices big players like Garmin and Wahoo.
With the current rising alternatives from magene and others, there might be better solutions, but my gamble to purchase the iGS800 has zero regrets.

2
Road Bike Frames, Wheels & Components / Re: Thoughts on modern frame geometry trends? Steep seat tubes? High stack?
« on: September 04, 2026, 02:51:41 PM »
Quote from: Eddy_Twerckx on September 04, 2026, 05:17:48 AM
I don't think I remember a single crash in the super tuck. Much like a lot of the UCI's "safety" rules, it's not really about safety.

And my point about the super tuck is that they are so much further forward than you're getting with a progressive fit. The super tuck is safe, and that's 20cm further forward than my position. Your claim that a progressive fit is dangerous is wildly inaccurate. And that's proven by the super tuck which is even further forward. If you think a forward saddle is dangerous, that's a skill issue, not inherent with the position. The position in itself isn't any more dangerous or compromising than a rearward position. The position doesn't make one safer than the other, the rider does. If a rider makes the forward position unsafe, the same rider will be unsafe with a rearward position. What's unsafe is going beyond your personal skill level.

The thing with the progressive fit is that it's still pretty rearward. You're at most, equal with the BB. I'm still 5cm behind. You seem to think this fit puts you in front of the BB or somehow shifts your weight forward enough to make it unstable, neither of which are true. You're still behind the BB. It's more about opening your hip angle to allow higher power output and more comfort. Like any fit change it'll take some getting used to. But to say it's unsafe or dangerous is just wrong. You're fear mongering.
I don't agree with this at all.

First, the supertuck didn't cause crashes because riders only used it solo or in tiny breakaways when they felt safe doing so. No pro was ever supertucking down a steep, twitchy descent in a group.

Second, any fit or position that shifts too much weight over the front wheel is dangerous by default. Unloading the rear tire ruins rear-brake traction, making quick emergency stops in the peloton way harder. It also ruins control—MTB riders lean behind the saddle on technical descents for this exact reason.

Also, rider height matters here. A tall rider creates much more leverage than a small rider, so a progressive fit impacts their weight distribution far more.

To avoid the front-end weight distribution, the actual solution is extending the front-center length of the frame to maintain stability without forcing poor rider posture. This is a must for the modern frames who want to make this solution possible.

3
Road Bike Frames, Wheels & Components / Re: Thoughts on modern frame geometry trends? Steep seat tubes? High stack?
« on: August 29, 2026, 02:30:29 AM »
@patliean1: so what did you modify at the front? Did you increase your reach / stack, is the distance between saddle and handlebar now different compared to your past set-up? With past setup, I mean mainly your old bikes, rather than the VRT where you were searching from the beginning for a manageable fit.
It would be interesting to hear in more detail about those changes.

4
Component Deals & Selection / Re: T47 bottom bracket 86mm for shimano
« on: August 14, 2026, 04:07:21 PM »
You can buy any bottom bracket. just knock the old bearings out and replace by a set of ntn, skf or other qualitative bearing brand.

5
Road Bike Frames, Wheels & Components / Re: Sensah Electronic Groupset (14 speed?)
« on: August 11, 2026, 03:59:17 AM »
Looks like the waleroad app will be the 'go-to' app:
https://play.google.com/store/apps/details?id=com.mywhaleroad.sentyeh.global&hl=en
The fact that they call the app SENTYEH ECS makes me assume it should work on the Sentyeh groupset rather than only the rebranded whaleroad groupset. If not the case, I wonder what a consumer of the TWITTER bike has to do to modify their shifting.

Below a short AI summary of the findings in China so far:
Pros
  • Excellent hood ergonomics, often rated better than Wheeltop and more comfortable than expected.
  • Wireless shifting is reported to be fast and reliable.
  • Brake lever design and maintenance access appear well thought out.
  • Includes programmable auxiliary buttons, firmware updates and app-based customization.
  • Settings are stored in the groupset itself, so it remains functional even without frequent app use.
Cons
  • Button click feel is relatively firm compared to SRAM AXS.
  • Long-term reliability is still largely unknown.
  • Replacement parts availability outside China remains a concern.
  • The 14-speed ecosystem (chains, cassettes, wear rates, future compatibility) is still unproven.
  • Many road riders are waiting for a mature 2x version before switching.
App / Software
  • A global Android app exists with firmware updates, battery monitoring, button customization and derailleur adjustment.
  • International support appears planned, although long-term software support remains to be proven.

6
Road Bike Frames, Wheels & Components / Re: Sensah Electronic Groupset (14 speed?)
« on: August 10, 2026, 09:36:00 AM »
Because at Taobao they sell the groupset at the retail price and bike manufactures get them at OEM price which is less than half of the retailprice. 

7
Road Bike Frames, Wheels & Components / Re: Dropbar Search with downsweep
« on: August 08, 2026, 05:17:41 AM »
Do you mean like literally any gravel bar/cockpit?

8
Component Deals & Selection / Re: Chinese cycling clothes
« on: July 22, 2026, 02:23:52 AM »
Quote from: GravelMaxxer on July 17, 2026, 09:23:33 AM
Hi all, I am quite tall (2m), usually have no big issues with tops, but when I need to wear something on my legs it’s always too short. So I’m looking at bibshorts currently, I have a pair of Isadore Alternative bibs in size L, which are nice and long enough. But I want to test out some aliexpress bibs, do you guys recommend any bibs that have longer inseam?

Spexcel might be a good option. For 190cm, 80kg their XL bibs work well for me

9
Road Bike Frames, Wheels & Components / Re: Sensah Electronic Groupset (14 speed?)
« on: July 17, 2026, 08:46:51 AM »
Please let there be guinea pigs. :)  If the price incl shipping is cheap enough for people in certain regions why not take the risk and enlighten us here on your findings.
 
Pros:
Sensah didn't rush this out. Taking more than 1.5 years to bring it to market suggests they did actual, rigorous testing. With their aim of supplying it to the domestic Chinese OEM market, the product might already have good maturity

Cons:
Competitors like Wheeltop and L-Twoo have given Chinese electronic groupsets a bad reputation. Both brands rushed releases and forced early adopters to deal with major bugs. Sensah might follow that same Chinese mentality of product development: release now, patch later.

So up to the early users to find out.

10
Road Bike Frames, Wheels & Components / Re: 35C vs measured width: 37mm? 39mm? 40mm?
« on: July 09, 2026, 12:20:52 PM »
If a frame states clearance for 35C, I expect clearance of 35mm +4mm clearance on both sides cfr iso standards. For road bikes I expect this takes a FD into account.
For gravel bikes (once we go above 45mm and need to accomodate to mud clearance), I would use the standard of 6mm clearance on both sides and personally I don't care about FD clearance since it's 2026. However, I would still expect brands to report on it.

To figure out how wide a tire realy is, I beleive there is somewhere on the WeightWeenies forum a database with references per tire/rim dimension.

11
Component Deals & Selection / Re: Chinese cycling clothes
« on: July 08, 2026, 09:58:31 AM »
Quote from: crazyravr on July 06, 2026, 12:53:42 PM
Just received this skin suit.
www.aliexpress.com/item/1005011789114241.html
Any chance you could share a picture wearing it (here or through PM)? I have similar dimensions, but I'm always woried about the leg length being too short based on the review pictures I've seen so far.

12
Road Bike Frames, Wheels & Components / Re: SL9 officially launched
« on: July 01, 2026, 03:08:52 AM »
The Specialized SL9 launch is straight out of the Apple playbook. Every two years, it’s the exact same script: they shave off some grams, change a tube shape and save a couple of watts, call it a 'revolutionary breakthrough,' and the fanboys lose their minds and rush to pre-order.

Don't get me wrong, it’s a premium bike, but you’re paying a massive 'S-Works tax' just for the brand. Anyone who actually looks at the data knows you can get the exact same performance—or better—from brands on the market.

With the SL8, the biggest aero gain came from the handlebar, now out of the 4Watt improvement half of it comes froms the wheels.

13
Road Bike Frames, Wheels & Components / Re: Conti GP 5000 35C: a new standard for road frames?
« on: June 30, 2026, 05:43:55 AM »
That's very interesting. This is what makes we wonder when people state tyre width X is faster/slower/more comfortable/... than tyre width Y.
There is so much variability in WAM for a certain tyre that people might be talking the same but mean something differently and vice versa.

Did you also measured tyre height?

14
Road Bike Frames, Wheels & Components / Re: Where to buy a decent quality replica frame?
« on: June 29, 2026, 03:20:20 AM »
First of all, I do not recommend buying replica frames. The word replica it just a nicer wording that counterfeit and that's illegal.
If you do want to proceed, first have a look at frames that have a similar look, are inspired by frame x, or y .
Iif you think you still prefer the illegal copy of your dream frame, buy it through a platform where you have a certain buyers protection like aliexpress.

Concerning quality: there is no single vendor of those replica frames that can guarantee a decent quality, that's simply not their objective.
So once you bought it, you either will be satisfied (great for you) or it will be a miss. In that last case, accept your losses (hoppefully no phyical losses) and move on.

15
Road Bike Frames, Wheels & Components / Re: XMCS - 2026 VRT
« on: June 26, 2026, 04:24:00 AM »
I have many questions with the test results one of which you already addressed with peak torque's comment.
The statement faster than, as fast, slower than...great as a YouTube title to draw the attention, but very irrelevant after looking at the high level test set-up  results as explained in the video.
The only conclusion I draw is that the frame is in line with the bettter aero bikes currently on the market.

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