Bicycle Technology
san_jose_guy
money was invented for handing to women, but buying dances is a chump's game
Saw a guy with a curious framed bike, Eddy Merchx, like this:
https://www.eddymerckx.com/
Through its Novara name, REI has often offered good bikes and at bit more sensible prices.
https://en.wikipedia.org/wiki/Novara_(co…
I find this Cannondale, $2000
I also find this CoOp Cycles $1349
https://www.rei.com/product/122465/co-op…
Now these are both pricey bikes, but I see them as practical.
The Cannondale, one sided fork?? Hub, axle and fastening have to be altered. No Good. Front racks are useful.
The CoOp one is fine.
Both have internal gear hub, Shimano 8 speed. I think they should have the Shimano 11 speed.
Both have hydraulic disc brakes. I don't go for that, creates maintenance problems. I only go for mechanical, cable pull, disc brakes.
Both have belt drive. This has been on the market for quite a while, quiet, clean. But if you have to replace on the road, adjust tension via elliptic thing for bottom bracket, tools, seat height change? I have questions. Belts are costly and introduce frictional losses.
Interested in seeing if shaft drive could be the answer.
Std chains do not last long, and then sprockets and gears get worn and need to be changed too.
Rather like to design my own bike frames and components, and sell them.
Know any good forums for Bike Technology issues?
SJG
Cafe Music, great youtube covers
https://www.youtube.com/watch?v=ywY2UaJ6…
https://www.youtube.com/watch?v=iTCkap0r…
https://www.youtube.com/watch?v=mNuL6Yui…
https://www.youtube.com/watch?v=xR9x3OIo…
The Mentors: Sex Slave
https://www.youtube.com/watch?v=bHuU-QZS…
https://www.eddymerckx.com/
Through its Novara name, REI has often offered good bikes and at bit more sensible prices.
https://en.wikipedia.org/wiki/Novara_(co…
I find this Cannondale, $2000
I also find this CoOp Cycles $1349
https://www.rei.com/product/122465/co-op…
Now these are both pricey bikes, but I see them as practical.
The Cannondale, one sided fork?? Hub, axle and fastening have to be altered. No Good. Front racks are useful.
The CoOp one is fine.
Both have internal gear hub, Shimano 8 speed. I think they should have the Shimano 11 speed.
Both have hydraulic disc brakes. I don't go for that, creates maintenance problems. I only go for mechanical, cable pull, disc brakes.
Both have belt drive. This has been on the market for quite a while, quiet, clean. But if you have to replace on the road, adjust tension via elliptic thing for bottom bracket, tools, seat height change? I have questions. Belts are costly and introduce frictional losses.
Interested in seeing if shaft drive could be the answer.
Std chains do not last long, and then sprockets and gears get worn and need to be changed too.
Rather like to design my own bike frames and components, and sell them.
Know any good forums for Bike Technology issues?
SJG
Cafe Music, great youtube covers
https://www.youtube.com/watch?v=ywY2UaJ6…
https://www.youtube.com/watch?v=iTCkap0r…
https://www.youtube.com/watch?v=mNuL6Yui…
https://www.youtube.com/watch?v=xR9x3OIo…
The Mentors: Sex Slave
https://www.youtube.com/watch?v=bHuU-QZS…
Got something to say?
Start your own discussion
17 comments
SJG
https://youtu.be/fGKR1Z1lRik
And I have never liked any of the indexed shifting derailleur systems. Stupid gimmicks for sponsored pro racers who get heavy boxes of new parts given to them regularly, sold to a public who never learned how to use friction shifters.
Shimano Internal Gear Hubs:
8 speed for disk brake, 3.07 gear range
https://bike.shimano.com/en-EU/product/c…
11 speed for disk brake, 4.09 gear range ( never ever would I need a broader range than this, even for longbike loaded up heavy )
https://bike.shimano.com/en-EU/product/c…
I'm only interested in cable pull disc brakes, not hydraulic.
Also I think German Rolloff? and USA SRAM?
SJG
Peter Frampton Do You Feel Like We Do (2019, quite interesting)
https://www.youtube.com/watch?v=jl4u6KQj…
Creedence Clearwater Revival - I Heard It Through The Grapevine
https://www.youtube.com/watch?v=NXJQOWsp…
Amy Winehouse/Paul Weller - I heard it through the grapevine.Hootynanny 2006.
https://www.youtube.com/watch?v=C1799Yps…
http://glendalecycles.com/bike-technolog…
SJG
https://www.youtube.com/watch?v=m7AIVyiC…
nice cable pull disk brakes, which I like. The the hydraulic disk brakes which I do not like.
https://www.cyclingweekly.com/reviews/bi…
https://biomega.com/retailers
https://biomega.com/retailers
They tend to make a lot of belt drive bikes. Not sure about shaft drive today.
SJG
TJ Street
https://tuscl.net/photo.php?id=3560
Wes Montgomery - Round Midnight
https://www.youtube.com/watch?v=MOm17yw_…
Bill Evans
https://www.youtube.com/watch?v=M3Eg4Zmb…
https://www.youtube.com/watch?v=m7AIVyiC…
Has a SRAM cable controller for the gear hub. So maybe it has a SRAM gear hub? Is there as SRAM shaft drive system, besides Shimano?
SJG
https://www.sram.com/en/sram
I am not seeing anything like an internal gear hub in their offering.
But then I let google look and it finds:
http://sheldonbrown.com/blog/wp-content/…
SJG
https://sheldonbrown.com/blog/2015/02/02…
SJG
https://bike.shimano.com/en-US/home.html
11 speed Alfine gear hub, 4 to 1 gear range, way more than enough!
https://bike.shimano.com/en-US/home.html
1,665 g
Gear rations actually go both down and up, about 1/2 to 1 to about 2 to 1.
https://www.gravelbike.com/mechanical-ro…
Hydraulic brakes may be the new hotness, but many road and gravel riders still prefer the simplicity and reliability of cable-operated disc brakes. And in 2016, mechanical disc brake fans have more choices than ever.
SJG
Shimano’s CX75 was one of the earlier road-compatible mechanical disc brakes. Due to performance-related issues, the company recalled the CX75 and replaced it with the improved CX77 ($69.99 MSRP). Shimano classifies the CX77 as a non-series component, meaning it’s compatible with a wide range of levers/shifters (and the brake’s grey finish looks good with both silver or black groupsets). Like the Paul Klamper, the CX77 features a single movable piston. While the CX77 may lack niceties such as tool-free pad and cable adjusters, it was the lightest caliper tested at 151 grams.
cx77-min
Setting up the CX77 is straightforward, but requires a lot of different tools. You’ll need a 5 mm hex key for the caliper and cable mounting bolts, a 3 mm hex key for the inner pad adjuster, a 2.5 mm hex key to adjust the outboard pad, and a small flat-blade screwdriver for the pad retainer. To further complicate things, the outer pad adjuster lacks any detents, and accessing the bolt can be difficult on some frames. The CX77’s stock resin pads proved quiet in dry and dusty conditions, but rain or snow would leave them squealing. Thankfully, Shimano’s XT (M785) and XTR (M985) brakes use the same G-series pads, so alternatives are available from third-party manufacturers.
As you might expect, the CX77 calipers worked great with Shimano’s levers. I was pleasantly surprised, however, to find that the CX77s performed equally well with SRAM’s Rival levers. The SRAM/CX77 combination didn’t allow for quite as much pad/rotor clearance, but that was only noticeable in muddy conditions, or with out-of-true rotors. SIngle-piston brakes sometimes get a bad rap for having a harsh, on/off feel that’s difficult to modulate, but that’s not the case with the CX77. They didn’t have the road-like feel of a dual-piston caliper, but the single-piston Shimano calipers offered solid braking without the tendency to unexpectedly lock the wheel.
TRP Spyre
If you’ve ridden a cantilever-brake-equipped bike in the past ten years there’s a good chance that those brakes were made by Tektro/TRP. That’s not to say that TRP is sleeping on disc brakes for road and gravel, though. The company now offers no less than five mechanical road disc brakes in addition to one hybrid model and two hydraulic systems. The basic 159-gram Spyre model that I tested may lack the carbon bits found on its pricier siblings, but it shares the same dual-sided actuation and adjustments. Like Shimano, TRP experienced some issues with early Spyres, which resulted in a recall of approximately 2,000 calipers in 2013.
spyre-min
Although the Spyres may lack tool-free pad adjusters, setting up the brakes is incredibly easy and requires only 3 mm and 5 mm hex keys. Attach the caliper with the mounting bolts finger tight, install the cable, pull and hold the lever, and tighten the mounting bolts. Thanks to the brakes’ dual-piston design, the calipers basically align themselves. The pad contact points can be fine tuned with a 3 mm hex key, but the inner and outer adjusters lack detents or indexing. Further fine tuning can be performed via the built-in barrel adjuster.
With their strong return springs, the Spyres have an extremely snappy feel at the lever. While this may not matter in dry, warm weather, it can be a real asset in gritty conditions. While I prefer the ergonomics of SRAM’s levers, I found that the Sypres performed best with the Shimano 5800 levers. The latter produce slightly more cable travel, which enables more clearance between the pads and rotor. Paired with either lever, though, the Spyres disprove the myth that road disc brakes lack modulation and control. Once bedded in, the mechanical TRP stoppers performed much like the company’s dual-pivot caliper brakes (which is very high praise).
Summary
All three of the above brakes offer viable alternatives to hydraulic setups. Because mechanical systems lack the automatic pad adjustment found on hydraulic brakes, they require a little more maintenance and attention to detail during installation and setup. Don’t underestimate the importance of cables and housings for mechanical disc brakes (or any cable-operated brake, for that matter). You’ll definitely want die-drawn or coated cables and compressionless housing (I used Jagwire’s excellent Road Pro XL kit). And as always, the late Sheldon Brown offers some very sage advice on the subject. Rotor and pad choice can also affect performance. Don’t be afraid to try different pad compounds or rotor sizes to dial in modulation and stopping power.
https://www.gravelbike.com/mechanical-ro…
SJG
SJG
Why Dutch Bikes are Better (and why you should want one)
https://www.youtube.com/watch?v=aESqrP3h…
SJG
TJ Street
https://tuscl.net/photo.php?id=2305
Fucking idiot.