Sorry about John's passing Cal, the 50s are young age nowadays.
+1 for Bike shots! I've more photos than I'd like to admit (film, where each frame is $) using the bike as a subject on the landscape. My not-yet bike buddy said he went to replace the Bottom Bracket on his bike, so I'll probably have a victim for an environmental portrait sometime in spring.
Even though I haven't yet seen his bike, bearings worn in 2 years seems a scant lifetime. His is an entry level bike I haven't seen yet though. The good stuff is still good! Did forensics and turns out I have the 1st gen XT V-brakes on my commuter. They have a parallelogram that keeps the shoes in optimal position, and despite reading their reputed squealing I guess a former owner took care of it. I really like their braking power, except when rims get wet...
I wasn't really interested in bikes themselves until I began to use one for some commuting, Rather recently I got nerdy about the more technical part of bikes.
It's a hobby that complements nicely with photography, by riding to locations. The expense can be up there to photography, but it can be much cheaper (second hand, decade+ old MTBs are cheap). Much harder to move and hoard bikes though!
Ended up watching a short video on the IBIS Ti Mojo, where basically they say how much improved are current bikes are
https://www.youtube.com/watch?time_continue=4&v=l8BsnI_iAGQ
Had a chuckle because he says the 71 degree headset angle and 75 deg seat angle are old school... My 2015 XC 29er is just a degree slacker in both dimensions. The more things change?
The bike industry literally reinvented the wheel. I'm wondering how long it may take to pitch back the virtues of 26".
My dad got offered a scant $500 (trading in with purchase of another bike) for a high end 4 year old carbon 27.5" hardtail. "No market for it" the dealers say, and the listing we put up had no interest. It's a Small size, but I gotta try it again on my next visit.
Jorde,
For some reason I kill headset bearings, but since I upgraded to Chris King headsets with sealed bearings pretty much I'm done and have a headset in each bike that will last the rest of my lifetime. I have a King heasets on the steel IBIS that dates back to the 80's.
I also have not experenced bottom bracket failures with any of the high end sealed bearing BB I have purchased. On all my bikes I have ti spindles to save weight (about half the weight of steel).
If you go to the Rodriguez Tandem site there is information on why he chooses not to use V-brakes on his high-end tandems: basically the pads are thin and become a cronic maintenance issue.
In the clip you posted there is a close-up of the front brakes. Take note that the arms are at a right angle to the pads. This is basically a design lifted from Tandems for increased leverage.
The bad is that they are not so low profile. They look like the front "Paul Component's" canti's I use on the front of my IBIS's. Originally on the Ti IBIS I ran these right angle canti's front and rear, but they are a bit too much on the rear and encourage skids. I de-rated to a lower profile Paul Component canti for the rear and recycled the right angle canti to the steel IBIS.
So canti's can have the same stopping power of discs. If you understand leverage and how it becomes a force multiplier than it can be understood that wheels that use disc brakes have to be built both heavier and stronger.
This is compounded also by increased wheel diameter. Fact is bigger diameter wheels have to be built stronger, and smaller wheels are inherently stronger. For equal strength the smaller wheel is considerably lighter, and the use of disc brakes requires overbuilding to handle the transfere of leverage of the wheel diameter via the spokes to the hub.
On a rim brake there is no lever effect, well only a very short lever of the tires profile diameter. Lighter wheels and smaller tires have less of a flywheel effect and take less energy to spool up to speed.
In the video you will notice that the Ti Mojo is a fun bike that the rider seems to throw around. The bike promotes not sitting in the saddle and spinning. In a way the rider is more active and moves around the cockpit more than if he were riding say a full suspension 29'er.
I can tell that the footage was shot out west. The trails are more open and faster out there. Here in the Northeast it is less flowing downhills, less open, and more short steep technical and rocky. Pretty much the riding requires more torque, is slower speed, and is less about catching air and doing drop offs.
I'm talking real "single track" that is basically narrow hiking trails. The wide handlebars that are the rage on 29'ers today would be a liability weaving through the trails. Back in the day bar-ends were "tree hooks," and narrow handlebars of 20-21 inches were required for real "single track."
If you heard the term "road rash" you would understand the term "bark-burn" where we would have scabs from brushing trees on our shoulders. You had to "countersteer" to even get the narrow bars through some closely spaced trees.
The laws of physics say it requires less energy to move a lighter object. Today's bike are not so light and are heavier because of bigger tires, wheels and suspension.
I would think that the Ti Mojo, which is the same bike as my Ti Mountain Trials, except my Mountain Trials has a 24 inch rear wheel and a shorter wheelbase, rigged with a modern 1x11 and a suspension fork is likely a 22 pound bike.
A full suspension with big wheels and chubby tires are great for high speed descents, drops, and more open riding, but under some conditions the added weight and the advantages are not worth it.
The modern bikes are built for a different speed envelope and their handling at slower speeds to me would be like riding a stationary bike while watching TV. I find it amusing seeing fat tire bikes and full suspension bikes in NYC. Why?
BTW the Ti Mojo had the "Handjob" (an investment cast piece of brass og a hand as a rear cable guide) that makes the Ti Mojo "Pre V-brake" meaning before 1995. That Ti Mojo is 25 years old. Mike bike has the same labels and stickers.
Cal