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ferrariharry mikelevy's article
Aug 15, 2022 at 4:29
Aug 15, 2022
First Ride: Prototype Supre Drivetrain - Crankworx Whistler 2022
@usedbikestuff: I guess riders with more downward time than upward time can expect a huge benefit. The issue of less unsprung weight and a more restrained chain is bigger than most people think. If priority 1 is not maintenance but pure fun on the trail of course. 1. RD weight: The biggest "wft"- moment is comparing a X01 mechanical RD (or even the DH RDs and cassette) to a AXS RD. I love this "F1" type shifting BUT it feels like you mount a brick to your hanger. I guess a lot of people feel the same if their rear wheel gets a view 100g lighter. So if the supre RD get´s lighter than a standard mech RD, I can see a more responsive rear end again. I think I read something like that as well in a pinion complete bike review, that they experience the same. 2. Chain damper: If you´ve ever changed from a RD without a damper to one with a damper or the other way around, you´ll know how much more solid your bike feels on the trail. If you watch the huck to flat videos you see how much energy there is on the chain. Even with current state dampers the chain may be slammed on the ground on your bike. Every device that can handle that a little bit better, would be a big selling point for me, cause the current state of dampers is not enough for me personal. But for your Nicolai point, you are right. I wouldn´t change my whole platform just for this new tech. But if you could get a cheaper frameset or your bike is run over by a truck why not.
ferrariharry Canyon-PureCycling's article
Dec 15, 2021 at 1:27
Dec 15, 2021
Video: Gabriel Wibmer Sends the Streets in 'Late for School 2'
@icraver23: Discount Fabio :D I laughed so hard that I almost p****d myself. 100%. Watched the Dennis Enarson video before. So bad placement for Gabriels video. It´s absolutely great riding but compared to the current riding level it´s almost a little cringe to watch
ferrariharry seb-stott's article
Nov 17, 2021 at 4:39
Nov 17, 2021
Why Shorter Cranks Are Better (According To Science)
For all the dirt and slopestyle buddies!! 165 all day. Changed from 175 (ridden all my life) to 165 last year. Absolute game changer. My numbers 6 feet, 207 lbs. Stiffer crank, easier manuals, easier tabletops or its variations, easier to catch tailwhips etc. overall different/more stable feeling. It might be wrong but it feels more efficient but I´m just riding standing.
ferrariharry jamessmurthwaite's article
Jun 18, 2021 at 3:11
Jun 18, 2021
Spotted: SRAM is Testing Something (But It's Probably Not a Dual Caliper Brake)
I quickly read through the comments, but if someone already wrote it, sorry. Maybe it´s just a simple first prototpye to test another way to deal with heat, which is actually to use 2 calibers, or let´s say 2 pairs of brake pads with a bigger distance from each other. The heat directly at the pad area (both pad and disc) is pretty high compared to some centimeters further on the rotor. So you just apply another "brake" where the rotor is cool enought again. I´ve seen this in the batman arkam knight trailer and it actually makes sence (sorry for the long link to the picture) https://www.google.com/imgres?imgurl=https%3A%2F%2Fi.ytimg.com%2Fvi%2F0MOyWepku_g%2Fmaxresdefault.jpg&imgrefurl=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D0MOyWepku_g&tbnid=68VA2zYO0qhOuM&vet=12ahUKEwiUkemN96DxAhXEGewKHTjtADoQMygHegUIARC_AQ..i&docid=aVZ2b6gajnA4UM&w=1280&h=720&q=batman%20arcam%20knight%20brake&ved=2ahUKEwiUkemN96DxAhXEGewKHTjtADoQMygHegUIARC_AQ#imgrc=KulIj_sT1QpNfM&imgdii=WwqOgIOcrSD6NM The best position would acutally be on the oposide side of the rotor. But when you keep weight ratios, price, new standards in mind, maybe a smaller distance like 10cm and smaller cylinders might be a sweet spot here. So they might test different distances and cylinder diameters right now. For that the cover. Maybe just 2 level cylinders mounted on a plate
ferrariharry mikekazimer's article
Jun 1, 2021 at 1:05
Jun 1, 2021
Trendspotting: 4 Predictions About the Near Future of Mountain Bike Tech
What about adjustable tire preasure on the fly. Additional trigger for high preasure for low drag uphill or comuting and low preasure for maximum grip on the decends. Would be my most wanted feature. Store the pumping energy everytime you´re braking and use it, to fill the tire when you need it. If this will be possible with a not crazy more weight, this might increase laptimes of races as well
ferrariharry sarahmoore's article
May 28, 2021 at 3:20
May 28, 2021
Field Trip: 10 Value Bikes Hucked to Flat In Slow Motion (1000FPS)
Geartype: For a bycycle you need a low drag so you should go with a straigth gears if the space allows it. Straigth gear: efficiency good - running behaviour bad - applicable torque bad - costs good Angled gear: efficiency bad - running behaviour good - applicable torque good - costs bad See hypoid gear just as the angled counter part to cone gears Pinion: True for the sealing and bearing type. Sealing might be manageable but the output shaft runns on two needle bearing. those are necessary for the load and space case. But are pretty bad for drag. A huge problem for applicable torque and smoothness of running is, that the gears run directly on the input shaft and 1. the 1,2,3,7,8,9,13,14,15th gear all runs by big pitch gears --> bad running behaviour 2. the 1st gear is big pitch to be able to (at least) handle as much load as possible. But in my oppinion not enough. Effigear is a little bit more robust here Effigear: - Sealing could be slightly better than pinion. But still 3 seals. But this might always be the case with a gearbox - Gearing technology is a simple a it gets. So you will always be compromised by the size of the whole box. gear steps will enlarge width and range the overall size. So with the same spec as pinion this thing will be way bigger and heavier. - At least effigear uses a big 1 stage gear to reduce torque for the shifting gears
ferrariharry mikekazimer's article
May 20, 2021 at 0:13
May 20, 2021
SRAM Granted Patent for Drivetrain With a Direct Mount Derailleur
@jomacba: As long as they are still using gearwheels they will never be able to beat the efficiency/weight/cost topic. Efficiency is really hard to measure accurately and connecting this to real efficiency on the final bike in daily use is even harder. That´s why no company is really marketing with efficiency. @iamamodel: I did this benchmark about a year ago and Rohloff is very far away from the other competitors. And lifetime of a product doesn´t interest you when you´re hitting a trail with your buddy and he´s 2timer faster cause you are running a extra kg on your back wheel. A compeatable product needs exacly, that it´s just better than a external drivetrain on the first ride
ferrariharry mikekazimer's article
May 20, 2021 at 0:00
May 20, 2021
SRAM Granted Patent for Drivetrain With a Direct Mount Derailleur
@TARTARA: It´s 40% milking the old cow and 60% really just not finding a robust concept or getting a existing robust. The Nr.1 topic on bike parts is, that the customer is abusing the S**t out of their bike and there is no understanding for issues like you have on a car for example. Most of the concepts are just old car tech packed into a bike. And to built a gearbox that can handle abuse is really hard to built.
ferrariharry mikekazimer's article
May 19, 2021 at 1:09
May 19, 2021
SRAM Granted Patent for Drivetrain With a Direct Mount Derailleur
This would make every patent ever obsolete. Best concept of the century. The mental horizon of the inventors make Leonardo Davincis seem small. I´ve put all my bitcoins into the fundraise and already sold all my bikes, looking forward to buy the first bike, equiped with this new tech. Everyday before going to bed I pray for this to happen
ferrariharry mikekazimer's article
May 19, 2021 at 0:55
May 19, 2021
SRAM Granted Patent for Drivetrain With a Direct Mount Derailleur
Pretty much the whole industry is working on them. It´s just really hard to beat the qualities of the external drivetrain. 1000 concepts where just beaten by the current tech. The concept which seems most promissing is still the shimano one. https://www.pinkbike.com/news/shimano-gearbox-in-the-works-files-patents-on-hybrid-roller-chain-sequential-shifting-transmission.html But there are a bunch of details to solve on a new system. And as everyone knows, Shimano needs a decade before going in production. Maybe a smaller company is still quicker with a bit less refined product, but honestly I see this concept as the most feasable in the upcoming years
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