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KATZbikes
- Member since Apr 21, 2010
- Male / 47
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Uri , Switzerland - 10 Followers
- 0 Trailforks Points
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KATZbikes jamessmurthwaite's article
May 12, 2020 at 12:15
May 12, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@EmBe81: waiting for the first combined e-motor-gearbox. then i am in ;-) But to be honest... The performance of Rohloff is hard to beat...
KATZbikes jamessmurthwaite's article
May 3, 2020 at 0:50
May 3, 2020
Throwback Thursday: Allen Millyard Talks Through the Unique Millyard 001 Downhill Bike
Check out our KATZ bike which was developed in 2007 and optimized in 2020 for personal use:
https://www.pinkbike.com/news/katz-bikes-returns-with-a-enduro-bike-with-a-maintenance-free-drivetrain.html
KATZbikes jamessmurthwaite's article
Apr 25, 2020 at 4:24
Apr 25, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@iamamodel: doesnt work. because our pivot point is in the upper chain line to achieve a totally pedal-neutral suspension, the distance between BB and rear axle always changes (as every bike with the Pivot not being placed in the chainring-center has this effect). the positions of our jockey wheels are exactly calculated so the "chain length" with fully compressed suspension changes only 0.5mm. we can compensate these 0.5mm with special jockey wheels. so the effect is that our chain always has the same tension and we dont need a long travel tensioner like a derailleur, which makes the chain loosing tension and can cause the chain to drop off the chainring.
KATZbikes jamessmurthwaite's article
Apr 25, 2020 at 1:40
Apr 25, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
Just that we probably had this design before Transition had it, so the question is, which looks like which?
KATZbikes jamessmurthwaite's article
Apr 24, 2020 at 5:29
Apr 24, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@iamamodel: if you spin your cranks,you have an input of around 1 watt. if the jockey swallows 0.2 watts, then its an efficiency degree of 80%. pretty bad and this you can see as a crankarm which stopps spinning earlier. but if youre riding, you have 100-200 Watts input, and when you loose 0.2 watts of it, you can forget it.
a chain which is not always lubricated, has a much bigger power loss than a jockey wheel. you can loose up to 20% with a dry/rusty chain. and this is a loss in percentage, not an absolute loss like the jockey wheel. so a dirty chain is one of the things which makes you the most possible powerloss besides tires with too little air.
KATZbikes jamessmurthwaite's article
Apr 23, 2020 at 23:59
Apr 23, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@iamamodel: and why a derailleur has no power loss but our bike should have?
KATZbikes jamessmurthwaite's article
Apr 23, 2020 at 23:52
Apr 23, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@MrZ32: thats the point :-)
KATZbikes jamessmurthwaite's article
Apr 23, 2020 at 14:33
Apr 23, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@excavator666: the best thing to get rid off the weight: free your mind.
To be honest: ever felt that your suspension is working worse with a DH-casing tire which adds 500-600 grams compared to a Enduro tire? i think nobody does. except you imagine it and then you also can feel 1 gram if your imagination is just strong enough.
KATZbikes jamessmurthwaite's article
Apr 23, 2020 at 13:15
Apr 23, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@focofox37: Check this picture from Eurobike 2010 you can see it with removed wheel. Copyright mtb-news.de
https://fstatic1.mtb-news.de/img/photos/1/5/8/3/_/large/_MG_1057.jpg?0
KATZbikes jamessmurthwaite's article
Apr 23, 2020 at 13:09
Apr 23, 2020
Katz Bikes Returns With an Enduro Bike with a 'Maintenance Free' Drivetrain
@focofox37: exactly
