11,735 reputation
21241
bio website
location Porto Alegre, Brazil
age 35
visits member for 1 year, 8 months
seen yesterday
stats profile views 287

I ride non-stop since I am 4, my father gave me one bike each 4 years until 18. Since then I am changing components and assembling new bikes. Now I have seven, including tandem, home-made recumbent, fixed gear, city-bike with generator and internal-gear-hub, freeride full-suspension.

I have been bred on XC mountainbike (raced a bit), and enjoy technical terrain, as well as light freeride, randonneuring, and touring. I also like to try to smoke my friends and acquaintances on group rides (and so do them).

I tend to do my own assembling and mainteinence, and am known among friends for a natural willingness to solve mechanical problems "in the field", even those not on my bike. I like to read about deep intricacies in bicycle mechanics, being a strong fan of a lot (but not all) of Sheldon Brown approaches.

Recently, I am engaged on bike as transportation, bike advocacy, and political-related-bike-issues, and participate in a lot of local groups, mostly nightbikers, weekend rides (not club rides) and Critical Mass.

My short-term bike-related goal is to have equipment and energy to commute all-year round (my winter is very rainy), and my long term goal, more like a dream, is to be full-time involved with bikes, professionally (most probably designing/manufacturing or selling stuff).


Mar
29
awarded  Notable Question
Mar
27
comment What's the correct position to assemble eliptic (Biopace, Rotor, etc) chainrings?
In the end, the Biopace design claims to have used empirical measurements, while RotoR apparently used speculative, inductive reasoning.
Mar
27
comment What's the correct position to assemble eliptic (Biopace, Rotor, etc) chainrings?
That's more or like what I think. Sheldon Brown has said something about the easier sector being use to ease the beginning of the downstroke, so that when the leg has already gained momentum, there comes chainring sector. That makes some sense, and would flatten the peak the peak of muscular force, while theoretically maintaining or improving the net power through the stroke. It would be interesting to check, with a round chainring, if the peak of muscular force (resultant force on the pedal) and power are in phase with each other, but that's harder to achieve without instrumentation.
Mar
27
revised What's the correct position to assemble eliptic (Biopace, Rotor, etc) chainrings?
added 256 characters in body
Mar
27
comment Differences between Biopace and Rotor cranks
In practice, a persistent rider could assemble the chainring in the position he wants after having tested the different five possibilities, because either rationale (RotoR's and Shimano's) seem to be much more inductive and speculative than deductive and evidence-based. And I guess different riders could get the "sweet spot" of cadence, torque or power with quite different setups...
Mar
27
asked What's the correct position to assemble eliptic (Biopace, Rotor, etc) chainrings?
Mar
27
answered Is it ok to use fixed gear threads for a freewheel?
Mar
26
comment What are my options for cycling mirrors?
I thought so. Your answer is very great! Congrats!
Mar
26
comment What are my options for cycling mirrors?
About helmet-mounted being always interrupting the field of vision, that is true for one eye at a time. With practice, the brain selects the which image to use if you want to "see" the mirror image (rear) or the actual front image ("behind" the mirror).
Mar
26
comment What are my options for cycling mirrors?
Nailed it! A deserved +1!
Mar
26
comment What are my options for cycling mirrors?
Is this supposed to be a community wiki?
Mar
24
answered How safe are helmet- or glasses-mounted mirrors?
Mar
20
answered What is the correct way to put a helmet on?
Mar
20
comment What is the correct way to put a helmet on?
Take your protein pills FIRST!
Mar
20
comment Protecting beater bicycle from scratches and rust
Being a beater implies looking like a beater. Painting the bike to make it beautiful doesn't sound "right", so as to spend a lot of time, money and effort to "protect" it. That said, touch-up with auto-primer and similar stuff, as said by @DanielRHicks, seems to be the most sensible solution.
Mar
18
comment What to do with old tires?
It's surprising to see how stuff that is useless for us are quite valued by those who sometimes can't afford even the bare minimum.
Mar
18
comment Are road bikes durable for use on roads full of cracks and potholes?
Cyclocross bikes are THE choice if you can have one. They are specifically designed to ride over rough terrain. But any moderate quality road bike should do. Only avoid the very low-end models (some entry level modelss of some brands).
Mar
16
awarded  Enlightened
Mar
16
awarded  Nice Answer
Mar
16
answered Are road bikes durable for use on roads full of cracks and potholes?