Pinkbike.com
Powered by Outside
bcmanucd
- Member since May 18, 2015
- Male / 44
-
Irvine , California - 1 Followers
- 0 Trailforks Points
Recent
bcmanucd seb-stott's article
Jan 22, 2026 at 10:27
Jan 22, 2026
The New Forbidden Heathen is a Titanium Hardtail With Proportionate Chainstays
@xciscool: There's no industry-wide standard for what "rear center" and "chainstay length" mean. Is it the point-to-point distance between the rear axle and BB, or the horizontal distance? I've seen it both ways for both terms. Sometimes looking at the geo diagram helps, but not always. If they list front center, you can add CS/rear center to front center, and if it equals the wheelbase, then it's a horizontal measurement (that's the case here with Forbidden).
And don't get me started on "effective seat angle"!
bcmanucd Dario-DiGiulio's article
Mar 12, 2024 at 15:05
Mar 12, 2024
Review: Specialized’s New Epic 8 - All the Speed You Need
Good point. What's the justification for lower BB on smaller frames? Only thing I can think of is breakover angle: https://en.wikipedia.org/wiki/Breakover_angle#:~:text=Breakover%20angle%20or%20rampover%20angle,vehicle%20other%20than%20the%20wheels.
So to maintain the same breakover angle, BB height has to increase as wheelbase grows.
bcmanucd dan-roberts's article
Sep 8, 2021 at 17:26
Sep 8, 2021
First Ride: SCOR 4060 - One Frame, Two Travel Options
I've got mixed feelings about this bike/brand/company. One one hand, I applaud them for giving us the effective seat angle at a nominal seat height. Thy typical measurement at a point level with the top of the head tube is meaningless - no one has their saddle that low, and depending on how slack the actual SA is, this effective SA could be wildly inaccurate for a tall rider.
On the other hand, they tout the low CG of the frame as a virtue. That's unproven at best, and a complete fallacy at worst.
bcmanucd dan-roberts's article
Sep 8, 2021 at 17:21
Sep 8, 2021
First Ride: SCOR 4060 - One Frame, Two Travel Options
Yes! Every MTB brand talks about how their bike was designed for a low CG, but no one has proved this is a good goal. Low CG makes sense on 4-wheeled vehicles, where body lean impedes handling. But on a 2-wheeled vehicle, lean is HOW you handle. Centralizing the CG helps you initiate and complete a turn more quickly and effortlessly.
bcmanucd seb-stott's article
Sep 1, 2021 at 14:35
Sep 1, 2021
First Look: The Digit Datum Has Shock Strut Suspension
@bek998: There's really not enough info on that anti-squat graph to draw any meaningful conclusions from it. In addition to the axle path, anti-squat is dependent on gear combo, CG height, and wheelbase. I'm sure Tim could have manipulated the graph to show 100% anti-squat at sag, but that would just be for one gear - still meaningless. The important takeaway is the slope of the curve, which shows that anti-squat falls as the bike goes into its travel. It means that getting good anti-squat performance will be dependent on setting sag properly (might be what JohanG is getting at), but it also means that the total chain growth from top-out to bottom-out (and therefore pedal kickback) is reduced compared to a single pivot with a flat anti-squat curve.
bcmanucd mattbeer's article
Jun 10, 2021 at 18:07
Jun 10, 2021
Bike Check: Amaury Pierron's Prototype Commencal Supreme - Leogang World Cup DH 2021
@mammal: Felt did some Equilink bikes with the pivot on the seatstays, some on the chainstays, and some with flex-stays. https://feltbicycles.com/collections/2019-bikes/products/compulsion-1-enduro-mountain-bike
https://www.vitalmtb.com/product/guide/Bikes,3/Felt/Virtue-FRD,20103
bcmanucd henryquinney's article
Jun 9, 2021 at 10:31
Jun 9, 2021
First Look: All New 2022 Scott Spark - The Next Generation of Integration
Yeah all those features are there to sell bikes, not to win races. The only functional advantage they tout is getting two bottles in the front triangle. That and lower CG, but no one has ever proved why lower CG is good for a bicycle.
bcmanucd edspratt's article
Feb 23, 2021 at 15:13
Feb 23, 2021
SRAM Buys Time Sport Pedal Business From Rossignol Group
That might be why SRAM bought PowerTap (maker of power meter road pedals) and just killed off the brand.
bcmanucd dan-roberts's article
Sep 3, 2020 at 22:34
Sep 3, 2020
2021 Marin Alpine Trail - Across the Pond Beaver
Short chainstays means they couldn't fit a seatstay bridge, as it would crash into the seat tube. With trunnion mount, there's no bolt tying the left and right sides of the rocker together through the shock eyelet. So they had to make a one-piece rocker to keep the system from being flexy as all get-out. It's not so much a feature as an explanation of the design trade-offs. No idea on the tolerance control, though.
bcmanucd dan-roberts's article
Apr 9, 2020 at 14:11
Apr 9, 2020
Neutron's Oh Sh!t Kit Gets You Out of a Pickle - Pond Beaver 2020
I don't see how the chain tool works. any more pics, or videos?
