Borikï¿½n Mountainbike

pochygorgotron · Posted: Thu Jan 07, 2010 1:29 am Post subject:

En algun momento del a~o corriente creo hare la inversion. Yo lo que corro es XC en bacalao mode y por lo visto una 29er en mis manos es como un Cadillac pa un viejo chocho such as me. La aguacatona me va a esgasnatar de celos, pero hay cari~o pa las dos.

Sigan informando.
_________________
Pochy "Gorgotron"
Equipo Administrativo Borikï¿½n Mountainbike
Vicepresidente Piratas De Boqueron MTB Club
Stericycle
http://www.facebook.com/gorgotron

Dr.E.Castro · Bicicletero Master Joined: 16 Mar 2008 Posts: 366

para los corredores de xc
_________________
"bakalaus 29erus vulgaris"

Dr.E.Castro · Bicicletero Master Joined: 16 Mar 2008 Posts: 366

http://www.mountain-bike-world.com/29-inch-mountain-bikes.html[url]
_________________
"bakalaus 29erus vulgaris"

Dr.E.Castro · Bicicletero Master Joined: 16 Mar 2008 Posts: 366

_________________
"bakalaus 29erus vulgaris"

Sarria · Bicicletero Cronico Joined: 08 Apr 2008 Posts: 969

Fico · Posted: Thu Jan 07, 2010 5:20 pm Post subject:

A mi me gusta esta trail bike, Rumblefish 29er...

Dr.E.Castro · Bicicletero Master Joined: 16 Mar 2008 Posts: 366

_________________
"bakalaus 29erus vulgaris"

pochygorgotron · Posted: Thu Jan 07, 2010 8:57 pm Post subject:

ea rayo, mi prox aguacatona tuenininer!

regalamela!!
_________________
Pochy "Gorgotron"
Equipo Administrativo Borikï¿½n Mountainbike
Vicepresidente Piratas De Boqueron MTB Club
Stericycle
http://www.facebook.com/gorgotron

Trecko · Posted: Thu Jan 07, 2010 10:14 pm Post subject:

ay taaahh!!!!!!!!! pochy pa que te enfiebres...
_________________
Disfruta la vida, es mï¿½s tarde de lo que crees...
Si te caes siete veces, levï¿½ntate ocho... y sigue pedaleando!!!...

Sarria · Bicicletero Cronico Joined: 08 Apr 2008 Posts: 969

No habï¿½a visto estas aun.

Ahora aunque la siguiente es una 26, a 16.5lbs sin pedales
no hay mucho que decir

Hensor · Bicicletero Elite Joined: 31 Jul 2008 Posts: 633

Hensor · Bicicletero Elite Joined: 31 Jul 2008 Posts: 633

Esa Turnes es la Sultan con el DW LInk. Es un cohete y pedalea super sfiff debido al diseno de la suspension. Definitivamente una buena inversion para que el unico up-grade se tenga que hacer sobre el sillin!! Pienso que la HI-FI 29 hay varios modelos mas XC que la Rumble y mas livianos. Chekeaos.. Very Happy

Yetiman · Bicicletero Avanzado Joined: 19 Sep 2008 Posts: 178

Pocos temas estan tan candentes en el MTB que el de las 29. Son la panacea? Son para todos? Sirven? No sirven? 26 vs 29? VHS vs Beta? Blue Ray vs HD DVD?
En todo siempre hay alternativas y las 29 son una mas. Pero es una alternativa real? Bueno ya Astacio establecio su punto al traernos los resultados de Kobelski y su esposa, ambos demostrando que se puede ganar en una 29.
Repasemos varios de los puntos negativos y positivos aqui mencionados:

Pesadas: hoy dia los componentes especificos para 29 siguen bajando de peso. Aros en 1,300gramos, horquillas en 3.6lbs, cuadros en 2.6lbs y gomas en los 500gramos. Asi que las 29 se pueden poner en 20lbs con mas o menos el mismo costo de una 26.

Lentas en las curvas: la geometria se ha alterado usando head angle mas agresivo y horquillas con mas offset, esto le las hace mas responsivas.

Largas para los singletracks: se esta adoptando seattubes con angulos o curvas para disminuir el largo del chainstay y asi lo largo de la bici, de manera que con leves ajustes en la entrada de las curvas se manejen tan o mas rapida que cualquiera.

Lentas arrancando: Definitivamente que si aumentamos el tamano de la goma y no ajustamos la pinoneria van a ser mas lentas que las 26. Si usted quiere que salga igual de rapido ajusta los platos o los cassettes. Varios companias trabajan en diferentes propuestas para esto incluyendo Shimano.

Pero eso son muchas desventajas y muchos ajustes! Para que molestarse con todo eso? Podria resumirse en comodidad. Si, comodidad. Lo primero que usted nota al montarse es lo suave que se desplaza en comparacion a una 26. A medida que el terreno se pone mas irregular menos se sufre, mas facil le pasa por encima a las piedras y mas confianza lleva.
Mientras menos las piedras lo detengan o lo tumben menos tiempo pierde.
Eso si, usted sigue siendo el motor y se tiene que chavar pedaleando. No espere que va a ir mas rapido sin usted darle pedal como se chavaria uno en una 26!
Tambien hay otros puntos positivos como el centro de gravedad mas bajo en relacion a los ejes entre otros. Pero la suavidad de la corrida y la confianza en los sitios tecnicos son el punto mas relevante.
Entonces son para todo el mundo? Bueno lo contestare con otra pregunta.
Las Full Suspencion son para todo el mundo? Twisted Evil

astacio75 · Bicicletero Cronico Joined: 13 Sep 2008 Posts: 989

Yo no tengo mas que agregar, Congo Yetiman,lo explica todo arriba.Ya me traje mi maquinita y le di una probadita cortita a ver como se sentia,un poco mas lenta arrancando,una vez desarrolla mas suave se siente y mejor se desplaza.Ahhh! encontre algo negativo que tengo que agregar,al caerte te das mas duro y mas grande es el gualletaso!!! Laughing

astacio75 · Bicicletero Cronico Joined: 13 Sep 2008 Posts: 989

[quote="Sarria"]

La Flash Carbon 29,una de mis favoritas,por ahora solo tenia $2,300 para gastar, tal vez en unos aï¿½itos puede sacar un budget de $10,000 para comprarla...

Sarria · Bicicletero Cronico Joined: 08 Apr 2008 Posts: 969

[quote="astacio75"]

Yetiman · Bicicletero Avanzado Joined: 19 Sep 2008 Posts: 178

BigEye · Posted: Sun Jan 10, 2010 4:19 pm Post subject:

astacio75 · Bicicletero Cronico Joined: 13 Sep 2008 Posts: 989

29ers or two-niners are mountain bikes that are built to use 700c or ISO 622 mm wheels.[1] Most mountain bicycles use ISO 559 mm wheels which are commonly called 26" wheels. The ISO 622 mm wheel is typically also used for road-racing, trekking, cyclo-cross, touring and hybrid bicycles. In some countries, mainly in Continental Europe, ISO 622 mm wheels are commonly called 28" wheels or "28 Incher".[2]
Contents
[hide]

* 1 Origins
* 2 Tires
* 3 Performance
o 3.1 Advantages
o 3.2 Drawbacks
* 4 96 or 69 Variations
* 5 References
* 6 External links

[edit] Origins
29" and 26" Mountain Bike wheels

The term 29er (or two-niner) is a little misleading. 29er rims have a diameter of approximately 24.5" (622 mm)[3] and the average 29" mountain bike tire has an outside diameter of about 28.5" (724 mm), though tires exist with diameters of over 29.15" (740mm). The typical 26" rim has a diameter of 22.0" (559 mm) and an outside tire diameter of about 26.2" (665 mm).

In the early 1980s, the size of the wheels for the emerging mountain bikes was undecided. English off-road cycling pioneer Geoff Apps contacted Gary Fisher and Charlie Kelly with news of 700c snow tires from Finland, that Geoff had built a bike around. In December 2006, Gary Fisher, speaking about the growing popularity of 29ers, gives his perspective: ï¿½We got some tyres from Geoff Apps really early on and we [Fisher and Kelly] said ï¿½Holy Toledo!ï¿½ï¿½ But the poor supply situation of the larger diameter tyres meant the fledging MTB industry stuck with the smaller wheel size." [4]

Various people claim to or are attributed to be the originator of the term "29er", the most plausible being Wes Williams of Crested Butte, CO.[5] The US division of Bianchi Bicycles offered a line of 29" wheeled off-road bikes beginning in 1991 called the Project bikes. Their 1992 product catalog raved about the advantages of the larger wheels and showed three different bikes, the Project 3, 5 and 7. The original company Klein produced a small quantity of a 29" wheeled version of their successful "Attitude" MTB racer, and named it the Adept. It failed to find a market and was discontinued. In the mid 1990ï¿½s, Diamondback Bicycles made their Overdrive bike, and Specialized made their Crossroads bike with 700c wheels, but they were actually hybrid bicycles with frame and fork clearance for larger tires. The Project and Overdrive bikes were not a success for many reasons, primarily a lack of proper off-road tires and suspension forks competitive with the 26" offerings of the time.

A key product release, the first true 29" tire, was produced by an early supporter of the 29" movement Wilderness Trail Bikes. The company introduced the first true 29" tire, the Nanoraptor, in 1999. At about the same time, White Brothers produced the first commercially available 29" suspension forks. Before then suspension forks used were forks designed for trekking bikes or hybrids. For many years 29" frames and bikes were usually only available from small little-known manufactures like Niner Bikes. Surly Bikes introduced their 29" frameset, the Karate Monkey, in 2002. Gary Fisher Bicycles, a division of Trek Bicycles, became the first of the major manufactures to offer a line of 29" bikes. Their lines never sold well until the introduction of single-speed 29" bike the Rig, in 2004. Today most bicycle manufacturers in the US market offer at least one 29" bicycle or frame. Even companies that openly dismissed 29" as a bad idea or passing trend, Specialized and Turner, are bringing 29" wheels to market.
[edit] Tires

A tire with a tread width of less than 2.0" (50 mm) is considered a Cyclocross tire by 29" enthusiasts, even though in cyclocross, any tire wider than 1.5" (38mm) is not a cyclocross tire. Although they are both used offroad and typically use a 622mm rim, cyclocross bikes and 29" wheeled MTBs differ in every other possible way, from bikes basic handling geometry, to construction methods, durability and intended lifespan. Bikes exist that blur the distinction by combining attributes of both, however.
[edit] Performance
Question book-new.svg
This section does not cite any references or sources.
Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (March 2009)

A debate over the advantages and disadvantages is currently raging in the mountain bike community. Those who believe the 29" wheel to be inferior often mention added weight, perceived sluggishness in handling, and problems with fit (specifically, front wheel/toe overlap and high standover height). 29" enthusiasts respond with comments about reduced rolling resistance, perceived increased stability without sacrificing quick handling, and an enhanced ability to roll over obstacles.
[edit] Advantages

* Larger wheels roll over obstacles more easily due to decrease in approach angle
* 29ï¿½ wheels are less prone to sinking in soft material such as sand and mud
* The longer contact patch increases cornering and straight line traction
* The larger wheels tend to raise the allowable height of the bottom bracket, cranks and chain wheels improving ground clearance
* 29" bikes tend to offer taller riders a more "natural" frame geometry[6]

Most of these claims have yet to be objectively investigated. Small scale, unpublished studies (including one done by Pepperdine University, reportedly at the request of Gary Fisher) exist but both proponents and detractors of 29" wheels are generally unimpressed with their lack of scientific rigor. Long debates over how to conduct a "fair" test of the efficiency of 29" vs 26" mountain bikes have raged online, but no serious efforts have been made to conduct a large-scale, scientific study.
[edit] Drawbacks

* Increased wheel weight and rotating mass - the spokes, rim, and tire are all larger.
* Longer spokes and rim result in a more laterally flexible wheel.
* Longer spokes and increased angle between hub flange and rim result in a weaker wheel.
* Many types of tires, rims and forks do not come in 29"-compatible versions, though the expanding popularity of the size is reducing this problem.
* Smaller riders (i.e. less than 5'5" tall) may not be able to find a 29" bike with a geometry suitable for them. Numerous examples exist of custom bikes built for very small riders with 29" wheels, but in many cases smaller riders face significant geometry tradeoffs, especially with regard to toe overlap, handlebar height, and standover.

[edit] 96 or 69 Variations

One variation is to have a 29" front wheel and a 26" rear wheel (commonly called a "96er"). Using the smaller rear wheel allows shorter and quicker handling frames, more options for rear suspension designs and lighter bicycle weight. Another variation is to have a 26" front wheel with a 29" rear wheel (commonly called a "69er"). Depending on the manufacturer, these names can be, although rarely, reversed. For example, Trek introduced a "69er" in 2007 with a 29" front wheel and a 26" rear wheel.[7] Carver Bicycles has a "96er" with a 29" front wheel and a 26" rear wheel.[8]

Yetiman · Bicicletero Avanzado Joined: 19 Sep 2008 Posts: 178

Como le zumba el Astacio al ingles!!!
Y en tono menos serio la analogia de Blue Ray vs HD DVD es haciendo inferencia a la eterna pregunta si la alternativa de las 29 acabara con las 26 como lo hizo el VHS con BETA. Que Gary Fisher sepa Apple no ha acabado con PC, Nikon con Cannon, etc Twisted Evil