Gravel tandem project
#26
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Our studio pictures came in.
The metallic brown shows well how different lighting makes it different colors.
The metallic brown shows well how different lighting makes it different colors.
#27
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Has anyone ever thought of coating inside of the frame tubes so they could be used to hold water? Or an internal bladder system.
Reading your post after getting off the phone with my Curaflo rep.
Reading your post after getting off the phone with my Curaflo rep.
#29
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Andy - Hit me up if you want to borrow some Nitto mustache bars for your build, or some of the slightly wider cheapo Nashbar steel mustache bars.
I'm in Boulder County as well.
I like Mustache bars on my gravel/touring bikes. Heck, I like m'bars on all my bikes these days. So many more comfortable hand positions and much much more secure handling of the bike on gravel. Probably not as much a big deal on smaller bikes, but our bikes are always franken'bilt up from 63cm bikes to something we can ride. Big bikes are inherently unstable and have death wobble issues.
I'm in Boulder County as well.
I like Mustache bars on my gravel/touring bikes. Heck, I like m'bars on all my bikes these days. So many more comfortable hand positions and much much more secure handling of the bike on gravel. Probably not as much a big deal on smaller bikes, but our bikes are always franken'bilt up from 63cm bikes to something we can ride. Big bikes are inherently unstable and have death wobble issues.
#31
Clipless in Coeur d'Alene
Hey Andy, I noticed in post #1 you mentioned
. But I seem to recall the experts (Zinn, etc) all said the synchro would only work with a full XTR setup (mtn derailleurs and shifters).
Are you able to use the XTR synchro (automatic) shifting in conjunction with the Ultegra 6770 shifters?
with the sychro-shifting and a bit of adjusting the program to shift out of the large ring early, you are prevented from severe cross chaining.
Are you able to use the XTR synchro (automatic) shifting in conjunction with the Ultegra 6770 shifters?
#32
Clipless in Coeur d'Alene
#33
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#34
Clipless in Coeur d'Alene
I grabbed that photo from Andy's (TurboTandem) FB page. Bags are apparently from J.Paks LLC (also on FB as "J.Paks LLC adventure cycling frame bags").
#35
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I grabbed that photo from Andy's (TurboTandem) FB page. Bags are apparently from J.Paks LLC (also on FB as "J.Paks LLC adventure cycling frame bags").
Thanks for posting! And glad to hear that you are able to finally get out on your new bike!!
#36
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Indeed the synchro shifting works! It was well confirmed before the build that the Ultegra 6770 drop shifters would work with the XTR derailleurs, but there was some uncertainty as to whether the bar display and syncro shifting would work. It turns out to work great. I've made two shifting maps, one for climbing and one with a tighter map for the flats. Each has different shift points on the way up and the way down. As you transition to the top of a set, the bartop display beeps to let me know the next shift will involve a front (and rear) shift. When it changes rings, I have it set to move the rear one or two steps along with the front change such that the transition maintains a cadence. One great thing about it, is that I have wide out-of-spec chainrings, and the syncro allows me to not worry about cross chaining into a gear that will exceed the chain length large-to-large, or exceed the chain wrap small-to-small. I also love the gear display for the couple second after each shift. No more looking back to see what gear I am in.
Last edited by Turbotandem; 03-20-16 at 10:25 PM.
#37
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I grabbed that photo from Andy's (TurboTandem) FB page. Bags are apparently from J.Paks LLC (also on FB as "J.Paks LLC adventure cycling frame bags").
#38
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Oh, another custom component in the works is that I was able to get Blacksheep to agree to design a custom Ti fork with wider clearance than the Whiskey Cross, a 410AC and 70mm offset which will help reduce flop when the bike is front loaded. And reduce toe cross when using big tire and expecting to weave a bit on tight terrain. I'll have him include bottle cage and "everything" cage mounts on the fork so I don't need to pipe clamp bottle cages to the fork legs like I did in the overnight picture above. I'll post picture when it comes in. I am debating leaving it bare Ti, or painting it black as the color scheme rather insist.
#39
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As far as the bottle mount vs bags, I am carrying hydration bladders (170oz total), in the top two frame bags. And then I made a little bar on the down tube bottle mount to lower the down toward the BB. That bottle is for liquid fuel (Ensure) which I use heavy on race days. Our last DK200 I went thru 12 to 16, about 1 per hour. Then I have one more bottle on the fork generally empty, but convenient to fill at a hose bib, and stoked for long unsupported sections. I'll not go into the bladder connection configuration, water filtering and other bike packing details here. If Ultra-distance gravel events were only about the equipment, this kind of planning would be the easy part. It's the other 90% mental/physical/intangibles that make the event hard!
#40
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The unladen bike weight is coming in at 30# meaning without the bags but everything else shown. The new fork will add some weight and we'll have a larger front tire. So maybe 31# at that point. The gear including bags, camping, tools, parts, clothing, everything but food and water comes in at another 20#. And then add some 15# for food and water. Lands us between 65# and 70#. That seems really heavy to me, but is only achieved after pursuing every single item in the build and in the gear "best-in-class" light-weight, with some exceptions on the bike build for durability/extra strength. I'm considering swapping the chain to a belt, at least for some events, but that only saves 130g and squeaks in the dust a lot more...
Last edited by Turbotandem; 03-19-16 at 07:49 PM.
#41
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The unladen bike weight is coming in at 30# meaning without the bags but everything else shown. The new fork will add some weight and we'll have a larger front tire. So maybe 31# at that point. The gear including bags, camping, tools, parts, clothing, everything but food and water comes in at another 20#. And then add some 15# for food and water. Lands us between 65# and 70#. That seems really heavy to me, but is only achieved after pursuing every single item in the build and in the gear "best-in-class" light-weight, with some exceptions on the bike build for durability/extra strength. I'm considering swapping the chain to a belt, at least for some events, but that only saves 130g and squeaks in the dust a lot more...
I hope that we can get out and ride with you guys on part of your Colorado journey - but keeping up with you guys, with us on our mtb tandem might be a bit of an issue!!
#42
Clipless in Coeur d'Alene
Indeed the synchro shifting works! It was well confirmed before the build that the Ultegra 6770 drop shifters would work with the XTR derailleurs, but there was some uncertainty as to whether the bar display and syncro shifting would work. It turns out to work great. I've made two shifting maps for climbing and for the flats. Each has differnt shift points on the way up and the way down. As you transition to the top of a set, the bartop display beeps to let me know the next shift will involve chaining a chain ring. When it changes rings, I have it set to move the rear one or two steps along with the front change such that the transition is near cadence. One great thing about it, is that I have wide chainrings, and the syncro allows me to not worry about cross chaining into a gear that will exceed the china length, or exceed the chain wrap. I also love the gear display for the couple second after each shift. No more loking back to see what gear I am in.
I'm using the xtr display only for gear indicator and a nicer battery level display as our setup is otherwise all the Ultegra Di2 11spd stuff (ie: no hope of synchro unless I fork out another bunch of cash for xtr derailleurs).
#43
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The only thing I wish I had was a button to temporarily make the display illuminate after it has turned off for a while when riding. It lights up for 5 seconds only after shifting, then goes dark to preserve the battery. After a period of time I forget if my next shift will be a chainring. Maybe an operator error, there may very well be a button to turn the display on for a sec without inducing a shift.
I'm not one to spend the time to seek out or post in other appropriate forums. If you know the forums feel free to quote my work. Or feel free to send people to this forum to ask me more questions.
#44
Clipless in Coeur d'Alene
The only thing I wish I had was a button to temporarily make the display illuminate after it has turned off for a while when riding. It lights up for 5 seconds only after shifting, then goes dark to preserve the battery. After a period of time I forget if my next shift will be a chainring. Maybe an operator error, there may very well be a button to turn the display on for a sec without inducing a shift.
Last edited by twocicle; 03-21-16 at 11:18 AM.
#45
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Healthy skepticism. I will say I have been diligent to NOT upgrade whatever firmware version I currently have for fear that doing so will irrevocably break what is currently working.
#46
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TT
Would be great to know how much this sort of thing would cost. Even in vague terms.
WPH
Would be great to know how much this sort of thing would cost. Even in vague terms.
WPH
#48
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Yes. Everything but the riv-nuts for water bottles and cable guides. The rear dropout plates might be aluminum (they're unpainted, maybe anodized). But every tube and joint of the frame's superstructure is Mg. If you get a coupled frame, then of course there are the steel couplers.
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This might be a "duh" kind of question but are you able to block out certain chainring combos on ultegra di2? you mentioned not being able to cross chain and that would be optimal for me to be able to program into my system. I haven't had a chance to play with e-tube software to know if I can do that.
using r785 levers, XTR display, ultegra F/R derailleurs in my build.
using r785 levers, XTR display, ultegra F/R derailleurs in my build.
#50
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This might be a "duh" kind of question but are you able to block out certain chainring combos on ultegra di2? you mentioned not being able to cross chain and that would be optimal for me to be able to program into my system. I haven't had a chance to play with e-tube software to know if I can do that.
using r785 levers, XTR display, ultegra F/R derailleurs in my build.
using r785 levers, XTR display, ultegra F/R derailleurs in my build.