穷人版XX改造XT 2 x 9 >>>

splua333

lksim 发表于 27-2-2013 11:09 PM
刚刚问了老脚他说shifter要换? 而且建议直接买个2盘的crank更好~~

讲真的shifter可以用回。我的Saint的shifter还没到时，Acera的shifter+FD都可以当2x来用而且还用了快一个月没问题。

要2x ,crank当然要2x。不然22x32那里够用？

2x和3x没什么分别，3x可以涵盖的范围比2x广。除非3x的最大和最小你用不着。

maxlee_76

mixie 发表于 20-1-2013 11:39 PM
我等你等了好久。。。
34T E13 guidring?

我也來個1x9 setup

mixie

dreamkl 发表于 22-2-2013 01:37 PM
mixie大人，你有换新链吗？freehubbody如果是shimano就是这样的。。。

怕弄坏新的cassette 和chainring。。。换链鸟。。。 PC971。

maxlee_76

mixie 发表于 23-2-2013 01:23 PM
中国一定强！
http://www.77bike.com/bbs/read.php?tid=12357&fpage=2

那中國custom made chainguide買到來要多少錢？

再加上下面這C.guide就漂亮了，不知道本地有沒有店進C.guide

mixie

maxlee_76 发表于 9-3-2013 08:57 AM
那中國custom made chainguide買到來要多少錢？

再加上下面這C.guide就漂亮了，不知道本地有沒有店進C ...

那个是在中国论坛看到的。应该也是全球唯一的非卖品。。。
设计和功能像Paul 的。喜欢它的简洁。

也喜欢c guide的简单设计，防下部掉链，防chain slap。DIY应该没问题。
但会一直磨着链条。spinning 时应该会浪费不少力气。
比较适合down hill吧。

maxlee_76

mixie 发表于 9-3-2013 11:33 AM
那个是在中国论坛看到的。应该也是全球唯一的非卖品。。。
设计和功能像Paul 的。喜欢它的简洁。

摩擦的阻力不會大，我隊友的29er specialized stumjumper FSR也有類似chainguide

我拿來試騎完全沒感覺到摩擦的阻力。

kenari

走火入魔？XC 賽車單盤化

http://cyclingtime.com/zh-tw/4202/article/%E8%B5%B0%E7%81%AB%E5%85%A5%E9%AD%94%EF%BC%9FXC%E8%B3%BD%E8%BB%8A%E5%96%AE%E7%9B%A4%E5%8C%96-

mixie

kenari 发表于 15-3-2013 04:22 PM
走火入魔？XC 賽車單盤化

http://cyclingtime.com/zh-tw/4202/article/%E8%B5%B0%E7%81%AB%E5%85%A5%E9% ...

割公公有兴趣脱掉？。。。。

kenari

mixie 发表于 15-3-2013 07:25 PM
割公公有兴趣脱掉？。。。。

我没有这样的料

mixie

sram 每次推出新科技，都会搞一些小动作，逼用户换过全套groupset或整个crank.
2x10 时出现了独家的80/120BCD
(3x crank BCD 多为64/104)

XX1 1x11 时又推出了怪诞的 76mm BCD
XX1的crank其实没什么过人之处，比较特别的地方反而是chainring的设计。
齿牙厚薄相间，大齿插大洞，小齿插小洞，稳定了链条，可以免除chainguide.



http://item.taobao.com/item.htm? ... &id=18886687338

可省掉chainguide的重量喔，又美观。。。
但这对DIY改了1x9,1x10的用户只有看爽的份。。。BCD不同，不能斗。。。
要嘛，换整个crank （shimano用户）；不然也要换个spider才行（sram x9,x0, xx）。。。
sram 可能会解释说104mm, 120mm太大，不能支援28T...
有道理。。。80mm呢？（当然不行，等下x9 2X 的拿来装，sram 就少做生意鸟）

不过，你有张良计，我有过墙梯
其实红毛人弄翻版也是很厉害的。
Wolf Tooth Components，104 BCD chainrings，USD79
http://shop.wolftoothcomponents.com/104-BCD-chainrings-001.htm
(比xx1 的USD115还便宜。。。76mm BCD也逼使上了车的XX1用户不能用便宜chaining）
http://www.bike198.com/first-loo ... rop-stop-chainring/




http://www.bikerumor.com/2012/07 ... -details-pics-more/
http://www.bikerumor.com/2012/12 ... oup-actual-weights/
http://www.chopmtb.com/2012/11/1 ... ng-wizardry/4/#null


http://item.taobao.com/item.htm? ... &id=18398471341

mixie

XX1 除了前面chainring比较特别之外，真正的主角应该是后面那个11 speed 10-42T的wide range cassette。



http://www.mtb-forum.it/visita-a ... ete-sapere-sullxx1/


DIY改1X的最大问题是后飞轮range 不足。
2X, 3X有前大小盘来增加变速系统的range.
single chainring 没有，上山下海就靠后飞轮所能提供的range。
前盘放太大怕上不了山；放太小又怕公路上跟不到大队。
虽然10speed 11-36T range 已经相当大，但DIY用户要根据自己的能力选择一个比较适合的前盘齿数时，难免要作出一点牺牲。

XX1的11 speed 10-42Tcassette解决了这个问题。
当然DIY用户只能看爽。。。

DIY 1x10 救星来了 11-40T
The Leonardi Factory General Lee cassette adapter



25-29-34-40T MSRP: 123.00 Euros ~rm500
配合SRAM 1030, 1050 and 1070 cassettes
25-29-34- 40t 用来替换原本的24-28-32-36

XX 10 speed cassette:                        11-12-14-16-18-21-24-28-32-36
SRAM XX1:                                      10 -12-14-16-18-21-24-28-32-36-42
SRAM 1070 with General Lee adapter: 11-12-14-16-18-21- 25-29- 34-  40

那么10 speed RD 能上到40T吗？
如果你问sram, 当然讲不能； shimano 叼你都没空

http://www.pinkbike.com/news/Gen ... irst-Look-2013.html

mixie

2X 大盘我是觉得gimmick 多过实际用途。
一开始是racer们根据场地需求，custom 3x成2x
sram 顺势推出2X, 造成一个新的潮流。
gear range 减少了但重量减不到100g (alloy chainring 很轻而已）
说什么3X, ratio overlap 很多，cross chainline 不好，不能用完后面的所有cog。。。
但2X小盘又可以cross chainline 配后小齿！？
2X, 3X小盘的位置根本就一样啊。

http://forums.mtbr.com/drivetrain-shifters-derailleurs-cranks/slx-crank-m660-m665-747651.html

If you look at the Shimano specs you'll see the chainline on the triple M660 (ie where the middle chainring sits) is 50mm, while the chainline on the double M665 (ie half way between the big and small) is 46.8mm. This effectively means the two rings on the M665 are in exctly the same place as the inner two rings on the M660. So, chainline is exactly the same whether you use an M665 double or just take the big ring off the M660 triple, and I've measured the two cranksets on the bike to confirm this.

由于range 减少了，2X crank 通常会有几个齿数组合让用户选（42-28，39-26, 38-24, 36-22。。。）
选错怎么办？买多一套chainring 来换。。。
3X range够大，不必担心找不到适合的ratio. sram 44-33-22；shimano 10 speed就 42-32-24不用选，不必头痛。
多余的ratio 你不要用，它也不会吵你； 要用到时tiak一下就有了。不会因为换了tyre或wheelsize而找不到适合的ratio.
26er 44T,42T大盘跑公路相当好用，特别是配上比较小条的公路胎时（1.5, 1.25)

比较high end的脚车都是两个盘是多一个卖点吧，特别是sram和BB30。

3X可以改成2X; 但2X不能改成3X。

=======================================================

我完全同意这个红毛人的看法。。。

madsadsalad                                                                                                                                                                                        Post subject: Re: Hating 2X10
Posted: Thu May 17, 2012 3:29 pm
The 1x and 2x to a lesser extent on a trail bike always seemed a bit gimmicky to me.  Just a way to sell more stuff.  On some levels mountain biking has always been a product pushing fashion show.  Some products, like the thru axle, disc brake, suspension, have pushed the sport to new levels.  Most are just trendy dead ends.   To me, a 1x10 on a trail bike makes about as much sense as a fixed gear track bike for the city.  A really, really bad idea, but all the rage.  I never had a problem with the 3x10 stuff and it simply gives you more options on a trail bike with essentially no penalty.  Why would you want fewer options?  I do run a bash and 2x on my big bike because it makes sense in that application.  It gives you greater clearance over steeeeep technical terrain on a realtively heavy bike with big tires that you will not outpedal with a 36 on a flatish grade.  The terrain you encounter with that bike is specific and the drivetrain suits its needs.  That said, it's nice to have a triple to put on for the whole enchilada.  You can rip down koko with a big ring. .   2x also makes sense on a race bike where you have a light bike and rider at a fixed weight for every ride that can be set up for a particular course(s).  In that application, the efficiency gain from the weight loss and fewer/quicker shifts can make the difference between a win and loss.  The limitations can be overcome by matching the ratios to the course.  On a flat course or certain gravity assited super-d courses a 1x might even make sense.  That said, do we really want to go back down the designing trail bikes to be like race bikes rabbit hole?  I for one hope not.  I have riden too many zero rise 130mm stems, 71 degree head angles, and flat bars to ever go back.  Race bikes (xc/dh/super-d/etc) are all a compromise. Trail bikes, on the other hand, are made for dealing with as great of a variety of terrain, ride lenghts, and even cargo added for really long rides as possible.  They are not (thankfully) race bikes.  Why not have a set-up that gives you those options?  Especially because on a 3x the 32 is the perfect middle gear for most terrain (especially with an 11-36 rear and 24 granny to do away with chain binding) and has not only the perfect chainline, but also the optimal diameter for most full suspension pivot locations.  A 2x, on the other hand, is a compromise in chainline, in gear-ratio sweet spot being on the upper and lower aspects of the two front rings instead of on the middle ring across the range, total gear-ratio range, and chain position on the front ring in realtion to the pivot location of the rear suspension.  Seemingly, the only thing against the 3x system is that it is not "cool" right now.  The racer boys and downhillers/super-d riders are pushing the 2x and sometimes 1x and the magazines/advertisment journals based on the coasts where they don't have terrain like ours are on board as well.  People want to be on the latest thing, so something like a 1x drive train on a trail bike will have some play before we all look back at it in ten years and laugh.  I mean, by the time you put the guides on a 1x to keep the chain on the ring it weighs about as much as it did.  People actually use front derailleurs as a chain minder.  Crazy.  Not even road race bikes are 1x for heavens sake.  As I say though, if people will actually pay extra to ride a fixed gear track bike with tiny little handlebars and no brakes in a city, they will do anything.  I'll keep a triple on my trail bike.  It gives me vastly more options and pedalling performance with essentially no drawbacks.  The Dyna Sys 3x10 is outstanding in all aspects of performance.

http://www.utahmountainbiking.com/UMBphpBB2/viewtopic.php?t=10409

then 做么我又搞 1X 呢？
英文答案：for fun。
中文答案：屁股痒。

mixie

xx1 crank。。。平平无奇。。。


sram red 22?... red 11?
36 tooth chainring, 11-28 cassette.


hydraulic disc brake double tap sram red 22



http://www.cxmagazine.com/adam-c ... nced-sea-otter-2013

mixie

要研究“梦佬传奇”怎么可以少了这帖。。。

2006 - 小梦子买车记，GT avalanche
2006 - 小梦子升级XT记
2010 - 梦哥版XT 改 2X9
2012 - 梦佬终极轻量化8.04kg, 1X9

summer_leong

mixie 发表于 22-5-2013 05:11 PM
要研究“梦佬传奇”怎么可以少了这帖。。。

2006 - 小梦子买车记，GT avalanche

最近梦哥很受欢迎

summer_leong

mixie 发表于 17-4-2013 11:26 AM
2X 大盘我是觉得gimmick 多过实际用途。
一开始是racer们根据场地需求，custom 3x成2x
sram 顺势推出2X,  ...

好想买一个做实验

summer_leong

mixie 发表于 17-4-2013 01:26 AM
XX1 除了前面chainring比较特别之外，真正的主角应该是后面那个11 speed 10-42T的wide range cassette。

...

好贵啊，大约RM600

http://www.ebay.com.my/itm/Gener ... 1f9da#ht_500wt_1156

音之忍者

dreamkl 发表于 11-5-2010 03:59 AM
1网购了这套single speed compatible 的螺丝组。

我看不到><
好想看看啊！！！！

vR33

找着24t

mixie

Drivetrain Wars - The 10 Speed Battle of SRAM vs. Shimano (Part 1)Sunday, February 12, 2012

Looking back on the past 24 months in BikeLand, it seems as though every fortnight a new revolutionary product is hitting the market, such is the pace of advancing technology in modern day mountain bikes. It kinda feels like we’re being bombarded by new bottom bracket standards, steerer tube sizes, drivetrain options, thru-axles, carbon fiber layups and suspension technology, making it hard to sift through the marketing spiel to see what is actually going to improve your riding. At the end of the day, a lot of these innovations are genuinely better than the component they replace, but whether it means anything to you, your riding style, riding conditions or budget is an entirely different kettle of fish.

Today’s example; The 10 speed Drivetrain.

10 Speed – what’s it all about?
While road bikes have been using an extra gear for a few years now, Mountain Bike 10 Speed was only introduced by the impressive XX groupset from SRAM back in late 2009. The 10 speed drivetrain shook up a somewhat stagnant market by adding an additional cog to the cassette to rework gearing ratios. The big push from SRAM was to use a double crankset up front instead of the usual triple, made all the more viable by a wide-range cassette out back. Instead of 11-34t ratio used on 3x9 drivetrains, the new 2x10 system got a big 11-36t cassette ratio, allowing for a similar high and low gear, with more usable shifts in between (think of all the gearing overlaps there are in a 3x9 system). What we are seeing now are a whole new range of drivetrain setups with both triple, double and single front chainring options, with riders being able to select the perfect setup for their riding style and track conditions.
However, along with a heavy marketing push, we’re also seeing many riders on setups that aren’t suited to their local trails or riding style.


Aside from gearing ratios, there are 2 other advantages of a 10 speed drivetrain. The first is smoother shifting, as the extra cog in the cassette provides smaller changes between each sprocket size, allowing for an easier transition for the chain between gears. The second is a stronger chain (converse to what many think) as the rollers of the chain are shorter than on a 9 speed chain, resulting in less flex and a higher torque rating. Sure you can still bust a chain from mis-shifting, but overall they’re stronger and the wear rate appears to be no different from 9 speed options, if not slightly better.



SRAM
Being the purveyor of 10 speed, SRAM have certainly gone deep into the new platform, with 5 different groupset levels available from the World Cup XX, down to the entry-level X5 groupset. While SRAM are still making triple cranksets, they believe that with the new 11-36t cassettes out back, most riders can benefit from downsizing to a double crankset to reduce front shifting and are really pushing the whole 2x10 shebang. However, up until now the available chainring sizes for their 2x cranks have been a little tall for our liking, making us recommend triple cranksets for weekend warriors, 29er riders and those frequenting steep terrain (the smallest double chainring option being 39/26). For 2012, SRAM have recognized that some of their gearing options were too high for all but XC riders and racers, and so have introduced new 2x chainring ratio options as an aftermarket upgrade (such as a 38/24 option).

SRAM XX: Superlight and super trick parts that make up SRAM’s top-tier groupset.. Lots of carbon and Titanium, and the CNC machined cassette is a real work of art. Available crankset ratios include 39/26t and 42/28t, with the cassette coming in both 11-32t and 11-36t.

• Buy Me: If you’re building the ultimate lightweight bike and want the best there is.
• Don’t Buy Me: If you’re not XC racing and you require lower gearing options.
  

SRAM XX Groupset 2x10 Speed

SRAM X0: Not a whole lot cheaper than XX, but many similar technologies in a package for more aggressive riders. Sweet carbon cranks, punchy trigger shifters and a bomber rear derailleur that is available in 3 cage lengths. Also available for 2012 is the X0 DH groupset with specific cranks and rear derailleur.

• Buy Me: If you have a carbon fetish and want bulletproof andlightweight
• Don’t Buy Me: If you’re on a budget and need to spend money on other thing…such as food.
  

SRAM X0 Groupset 2x10 Speed

SRAM X0 3x10 Groupset

SRAM X0 DH Groupset 1x10 Speed

SRAM X9: Excellent value gruppo with trickle-down technology from the XX components. Not quite as slick and punchy in shifting as its bigger brothers, but hollow alloy cranks are stiff and overall weight is very good.
You can get a triple crankset and the double in both 39/26t and 42/28t following the X-Glide 1:1.5 ratio for uber-fast shifting up front.

• Buy Me: If you like chunky SRAM shifting and love the 2x10 concept.
• Don’t Buy Me: If your main concern is weight – you’ll have to go higher up.
  

SRAM X9 Groupset 2x10 Speed

SRAM X9 Groupset 3x10 Speed

What do you think of the whole 10 speed movement? Is it as good as your previous 9 speed drivetrain? Do you think SRAM have the 2x10 market stitched up or is this one big marketing fad you want to avoid? Let us know what you think and leave a comment below.

Tune in next time for our in-depth look at offerings from Shimano, as well as other drivetrain options currently spreading into the market.