d***t
发帖数: 542 | 1 I just got Windsor Hour fixed gear bike from BD a few weeks ago. On their
website, it is said to have 1/8" chainring, but my chainring looks thinner
than the 1/8" cog obviously. Is 1/8" chainring the same thickness as 1/8"
cog or they put a wrong chainring (3/32")? Thanks. Sorry, can't input
Chinese from this computer. |
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V*****n
发帖数: 893 | 2 FSA的牌子，7075T6 Alloy(best), 买的旧的，原主说只有200迈cyclocross，估计不止
，当时就有掉齿了，肯定很多powershifting，
这chainrings是10速的，齿很薄，现在已经磨的变形了， |
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a****t
发帖数: 720 | 3 比如9spd的chainring能用在6/7spd的chain上吗？
跟performance bike的人live chat，他说可以，我很怀疑之。
谢谢 |
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o********n
发帖数: 839 | 4 Ironman Lake Placid的自行车道会有很多长坡。42齿的chainring对我来说太大了。
所以就在网上买了39齿的，昨天换上了。供各位参考。 |
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o********n
发帖数: 839 | 5 第一个图是42齿和新的39齿。
第二个图是去了inner chainring的crankset. |
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o********n
发帖数: 839 | 6 大部分时间是用大圈(Outer Chainring)52齿。上陡坡和长陡时用小圈(Inner Chaining
)39齿。 |
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i*********5
发帖数: 19210 | 7 【 以下文字转载自 Tri 讨论区 】
发信人: ironman2015 (IMMT 2013), 信区: Tri
标 题: 2013 Fall Epic 8 Hour 比赛报告
发信站: BBS 未名空间站 (Mon Sep 30 01:16:04 2013, 美东)
What a great day of racing at Hardwood Hill! Never rode my mountain bike so
long in a day before. But since it's the only day I get to ride my MTB for
the year, why not make it worth the trip. After all 8-hour is relatively
short compared to an 11-hour Ironman.
All the preparation was checking out last year's solo result and comparing
that to my times in the re... 阅读全帖 |
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t********t
发帖数: 5415 | 8 工具党的话几块钱弄个wear indicator
固定在chainring上的功率表不好？功率表大厂SRM表示不服...都折腾到换chainring了
，那几个螺丝怎么都要拧，最多是重新calibrate，何况calibration是每次ride都要做
的...
至少到现在，chainring和rear hub(powertap)仍然是功率计最大的两股势力。 |
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i*********5
发帖数: 19210 | 9 What a great day of racing at Hardwood Hill! Never rode my mountain bike so
long in a day before. But since it's the only day I get to ride my MTB for
the year, why not make it worth the trip. After all 8-hour is relatively
short compared to an 11-hour Ironman.
All the preparation was checking out last year's solo result and comparing
that to my times in the relay team. And I figured if the course is a 9km one
, then I should aim for 14 laps or 34:15 per lap (10% slower than my average
lap time ... 阅读全帖 |
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w******x
发帖数: 4396 | 10
that doesn't support what you are saying one way or the other.
on one hand, your chainring is roughly 3mm in thickness. think about how
much offcenter the teeth can be. on the other, the chain sits on top of the
entire chainring, not just the teeth. the position of the teeth is only to
facilitate shifting. it has nothing to do with the position of your chain.
hehe, you simply haven't run into problems like these enough. ritchey cranks
consistently have the lowest q factors among similar cranks. |
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J********e
发帖数: 2284 | 12 今天第一次用新车单独骑了30miles，地形是mild rolling hills。发觉和旧车的换档
有很大区别。
旧车是用的compact chainring + 11-28T
新车是用的standard chainring + 11-26T
发现我在平路上，用到big ring时，后面居然要21或23T才不感到吃力。后来干脆用
small ring加11-14T。也许问题的根源是我最近太弱。
爬坡更惨，用到small ring和26T（最小的组合），有一个坡差点没爬上去。
现在有几个选项：
1. 什么也不做，等训练水平上去了，希望问题自然解决。
2. 把cassette换到11-28T
3. 把cassette换到11-32T
大家有什么建议？还有，如果要换cassette，买二手的单个22,25,28T是不是更划算些
？ |
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i*********5
发帖数: 19210 | 13 应该就可以了，powermeter做在crank spider里的，跟chainrings没用关系了。
不过我的Quarq Rotor 3D含Q-Rings椭圆chainrings。 |
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R*****s
发帖数: 41236 | 14 哦，wear indicator啥样，link?
固定在chainring的只有一种，新出的powertap c1, 其他几种是放在crank arm spider
上面的，那个可以随便换不同齿数的齿轮，但powertap c1, 就不能换齿轮了，他家faq
里有讲...
俺还是上power2max 好了，顺便换成classic chainring.. |
|
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Y****6
发帖数: 1235 | 16 理论上讲， cranker 上的 chainring, 可以对应于后面cassette 上的每一个， 但是
cross chain 会加速 磨损，通常是不建议的。
不过， mountain bike 还有 1x 10； 1x 11. 前面的 Chainring 没得选 |
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s******y
发帖数: 431 | 17 也知道了100块车跟1000块车的区别..呵呵
难调的主要原因是CHAINRING跟cassette都有BEND..这样导致链条在转动的时候
不是一个平面上..这样在HIGH..LOW END两边总是蹭一边..
最后放弃了21速..当14速调终于调完美了..
剩下一个RING不是上很陡得坡应该用不上.
前天还下单了一双鞋,CLIPLESS PEDAL跟HEART RATE MONITOR..
一共又投资了109刀..
现在的配置是:车+SORA闸+头盔+打气筒+DIADORA鞋+FORTE PEDAL+COMPUTER,
总花费已经快300刀了 |
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D****g
发帖数: 2860 | 18 ☆─────────────────────────────────────☆
eigenface (:-D) 于 (Mon Oct 1 16:04:01 2007) 提到:
还是就这样不能兼顾所有的gear?
rolling hill的时候得不时调一下trimming
是不是得花时间仔细调limit screw, trimming?
没有架子比较麻烦,
☆─────────────────────────────────────☆
Deling (流浪歌手-don't tase me, bro!) 于 (Mon Oct 1 16:08:35 2007) 提到:
好好调一下limit screws和index。我的基本不蹭，只有chainring在最小，后面在中间
靠外的几档稍微有点蹭。那几档本来就不应该用到。
☆─────────────────────────────────────☆
zhanglaosan (张老三) 于 (Mon Oct 1 16:27:15 2007) 提到:
你的也是sora？哈哈，俺和高手都一个级别了
☆────── |
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w******x
发帖数: 4396 | 19 narrow down the suspects. is the clicking noise coming out once per rev?
does it happen if you were not sitting on the saddle? does it happen if you
were not on the bike but rotate the crank with the left pedal? the right?
neither? are your chainring bolts tight? are there any cracks on the
chainstay (don't laugh--it happens more than you think)?
use your common sense to isolate the cause, then fix it. |
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O****e
发帖数: 3290 | 21 Thank you all for your one cent of wisdom. I just finished overhauling my BB
and Crank. Oh, my god, it is so hard to unscrew the BB. 我使出吃奶的劲也没
能把它拧松。Finally, it came to my mind I could use a hammer. That solves
the problem.
Anyway, it is dirty. But, I could not really find any serious sign of
problem or I don't have the experience to tell. However, I did find a couple
of chainring bolts that are loose this time. Maybe that is the problem as
ferdinandshe suggested. I will test ride it on Monday a |
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O****e
发帖数: 3290 | 22 Ride my bike today. It is quiet now on the climb. By 90% chance, the culprit
is the chainring bolts. Thanks, ferdinandshe. I will see how often I need
to tighten it. |
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w******x
发帖数: 4396 | 23 will work. chainrings are not very different between 9 and 10. |
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V*****n
发帖数: 893 | 24
that's not even up for debate.
http://sheldonbrown.com/speeds.html#chainrings
is likely wrong. sram chains being slightly wider than their shimano
counterparts didn't help you either.
the ritchey chainset uses shimano spline BB. should be no problem with the
chainline |
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w******x
发帖数: 4396 | 25
yes, change out both cable and housing in a different bike shop. i don't
know who did it to your cables, but if the last LBS didn't even inform you
of the damage, they are not doing their job.
maybe, although front shifting depends on the chainrings as much as
derailleur. get the cable done first.
triple. 9 speed. |
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i*********5
发帖数: 19210 | 26 The main difference I can tell from the specs are:
Better crank & Bottom Bracket in 2010 Motobecane GrandSprint Factory Direct
Price $1,195.99 (List $2595)
Crank: FACTORY UPGRADE FSA SLK-Lite MegaEXO Hollow Carbon Fiber Crankset 53/
39T (List $450) 48-52/54-56/58-64cm = 170/172.5/175mm
Bottom Bracket: FSA Sealed Cartridge Mega EXO, external bearing system
And the extra granny chainring in the cheaper bike is mostly useless unless
you do a lot of real mountain climbing. |
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h******2
发帖数: 1498 | 27 Pedal force QS3 deal:
Frame:
QS3 $550.00
Seatpost:
P2 300mm x 31.6mm $59.00
Crankset:
SRAM Force BB30 Crankset w/ BB30 Bearings
Chainring combination : 34-50T
Crank length : 172.5 mm $260.25
Chain:
SRAM Force PC-1091 PowerChain $46.20
Front Derailleur:
SRAM Force Front Derailleur 34.9mm $44.69
Rear Derailleur:
SRAM Force Rear Derailleur $93.32
Brakes:
SRAM Rival brakeset $80.85
Integrated Shifter & Brake Lever Set:
SRAM Force DoubleTap Controls... 阅读全帖 |
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J********e
发帖数: 2284 | 28 认识的一个Cat2牛鸟人要卖他的SRAM Red BB30 Crank and RED clamp on front
derailer，号称"supa cheap"但是不知道有多cheap：
BB30 Crankset w/ BB30 Bearings
Chainring combination : 53x39
Crank length : 172.5 mm
以上和你以前建议的50x34不一样 - 区别大吗？ |
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a*****y
发帖数: 1488 | 29 Trek 700
Frameset
Sizes 15, 17.5, 20, 22.5"
Frame Trek steel, hybrid design
Fork High tensile steel w/curved blades
Wheels
Wheels Alloy hubs; Bontrager 550 36-hole alloy rims
Tires Bontrager H4, 700x35c
Drivetrain
Shifters SRAM MRX, 7-speed twist
Front Derailleur n/a
Rear Derailleur Shimano TX51
Crank Alloy, 42T chainring w/guard
Cassette Shimano 14-34, 7 speed
Pedals Nylon platform
Components
Saddle Bontrager Boulevard
Seat Post Alloy, adjusta... 阅读全帖 |
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h*****a
发帖数: 1992 | 30 原来的Force RD是short cage, 没有32的capacity. 这个我是试过的，无论怎么调B螺丝，那个pully wheel总会碰到32T，所以根本没法用。Apex RD 和Rival RD现在都用midcage的 option, 都可以上32T。12-32的平路会好点吧，小的几个cog之间间隔没那么大。不过我买的时候没看着有。
那个前50后32调不顺的原因似乎是前后derailiuer的夹角问题。在那个状态下，pully wheel离前面的chainring太近了，导致链条与frame之间形成一个很大的夹角，以至链条无法完全套进pully wheel的齿轮里。这个问题其实在前50后28的情况下也有，但是后来放松了B螺丝以后就没问题了。但是前50后32还是不行。我看了下，唯一可以解决的办法是把链条加长一节，但是这样的话前34后11的combo就会有问题。(也许这是为什么你建议12-32的原因?)
Is
saw
,
was |
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w********6
发帖数: 12977 | 31 It's the lowest priced carbon 105 bike from PB,
priced at $1299 before 20% double point, is that a good deal?
BOTTOM BRACKET: FSA SLK Mega Exo
BRAKES: Tektro R320, dual pivot
CASSETTE: Shimano 9-SPEED
CHAIN: KMC Z 9-speed
CRANKSET: FSA Omega Compact, 34T/50T chainrings
REAR DERAILLEUR: Shimano 105 RD-5600
FORK: SL3 Carbon blades, Alloy steerer
SADDLE: Selle Italia XO Flow
FRAME: Full Carbon Monocoque SL6, double water ... 阅读全帖 |
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k****r
发帖数: 593 | 32 2010 Scattante R-570 Road Bike from PB $899. Is this a good deal?
http://www.performancebike.com/bikes/Product_10052_10551_109123
2010 Scattante R-570 Road Bike
BOTTOM BRACKET: FSA Mega EXO
PEDALS: Wellgo Clipless Road
BRAKES: Tektro R520, dual pivot
REAR DERAILLEUR: New Shimano 105
CASSETTE: New Shimano 105, CS-5700, 10-speed, 12-25T
CHAIN: KMC DX10 SC, 1/2"x11/128",116L
CRANKSET: FSA Gossamer, 50/39/30T chainrings
FORK: SL3 1 1/8" CroMo steerer, ... 阅读全帖 |
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l********m
发帖数: 191 | 33 简介：在上海时跟同学周末骑浦东机场骑得也不宜乐乎，来回八九十公里吧，骑得是
Giant初初级的买菜roadbike，好像900多人刀买的，也挺喜欢,所以对器材不是太敏感
现在预算$1K以内，新手，求版上老大们意见；版上考察了一下，好像Scattante
性价比不错（还是很看重性价比的），然后选择的话也就R570了，这个车899算deal吗
2010 Scattante R-570 Road Bike
http://www.performancebike.com/bikes/Product_10052_10551_109123
BOTTOM BRACKET: FSA Mega EXO
PEDALS: Wellgo Clipless Road
BRAKES: Tektro R520, dual pivot
REAR DERAILLEUR: New Shimano 105
CASSETTE: New Shimano 105, CS-5700, 10-speed, 12-25T
CHAIN: KMC DX10 SC, 1/... 阅读全帖 |
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G********d
发帖数: 10250 | 34 不过列下目前我觉得需要的东西
水平dropout的车架 最好有刹车的口
track rear wheel
cog 比如surly dingle cog
链条和链条工具
chainring crank和踏板等（和road bike几乎一样）
handlebar
前刹车
水平dropout似乎比较难从新式 road bike上搞
全新的fixie似乎也不贵 所以放弃了 |
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c*******r
发帖数: 13580 | 35 yes. but it can not be exchanged with a single speed |
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i*********5
发帖数: 19210 | 38 and now i remember this problem happens to my MTBs more often 'cause MTB has
26" wheels (road's 700c is 28") so the chainstay is shorter than road bike'
s. also MTB has three chainrings, so more cross over. |
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p********y
发帖数: 5141 | 39 应该是换档时机没掌握对。
当然还有一种情况是chainring磨损，需要更换了。不过如果才一年，应该不至于。
你下次骑车的时候带一副一次性的橡胶手套，这样车子有什么问题修得时候不会弄脏手。 |
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l******n
发帖数: 256 | 40 1。载重买菜车：01.jpg
Frame: a steel frame donated by a Roadmaster
Handlebar: steel, donated by the Roadmaster
Grips: Scwinn Ergo Comfort Grips
Brake levers: Origin 8
Rear Shifter: Shimano Altus M310
Stem: alloy, donated by the Vilano single speed
Stem adapter: Tranz X
Headset: Sunlite Chrome Steel
Fork: Pyramid Chrome
Brakes: Origin 8 ATB V-Brake set
Saddle: Ventura ASA MTB
Seatpost: Action 22" 25.4, Chomoly
Tail Light: Planet Bike Superflash
Water Bottle Cage: Sunlite Alloy
Chain: KMC Z50
Bottom Brac... 阅读全帖 |
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a****t
发帖数: 720 | 41 这三周基本每天一小时，适应恢复，和联系爬坡，12-15迈，一次1500-1800ft，总共差
不多也有30000ft了，感觉没什么提高。平均踏频70，平均心律160-165，grade 5-6%时
cassette用21牙，10%以下用24牙，10以上28牙，前面的chainring都是36牙。
9月分离开加州，想在离开之前去爬一次lick的HC。每天也最多就这一个小时练习。不
知各位有何建议。谢谢 |
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n******d
发帖数: 3583 | 42 如果想清洗链条，拆下来整是最简单的啦。拆下来放在个什么盆里，然后去油上油都简
单，不用担心mess up清理的地方，当然你的要用换一节quicklink，方便拆卸
http://www.amazon.com/KMC-Missing-Link-10-Speed-Cd/dp/B001CK0FK
洗链器这类东西，我也用过，洗了链条还要清洁工具，更麻烦，不建议使用。
每次骑完，我一般用布擦擦链条chainring什么的，如果需要就在布上喷点油搽上去，
300~500拆下来彻底清洗一下，雨天骑后最好清洁一下。
清洁这确实是习惯，俺还是喜欢闪亮的链条，每次骑完擦擦也就几分钟的事，而且30~
50一条的链条俺还是还是挺贵的。 |
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i*********5
发帖数: 19210 | 43 http://road.cc/content/news/65656-eurobike-2012-rotor-launch-po
Rotor officially launched the new Rotor Power chainset at Eurobike, after we
saw a prototype this time last year.
Measuring power is for professionals and serious amateurs alike and this is
Rotor's first offering for those who want to run a complete Rotor system.
Unlike other products which use a single meter, the Rotor Power cranks has
two meters incorporating four strain gauges apiece, in each crank arm. This
allows more accurate ... 阅读全帖 |
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i*********5
发帖数: 19210 | 44 http://road.cc/content/news/65656-eurobike-2012-rotor-launch-po
Rotor officially launched the new Rotor Power chainset at Eurobike, after we
saw a prototype this time last year.
Measuring power is for professionals and serious amateurs alike and this is
Rotor's first offering for those who want to run a complete Rotor system.
Unlike other products which use a single meter, the Rotor Power cranks has
two meters incorporating four strain gauges apiece, in each crank arm. This
allows more accurate ... 阅读全帖 |
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i*********5
发帖数: 19210 | 45 I was at Interbike for the first time this year, and a big trend was crank
arm-based power meters. There were at least three there:
Rotor Power,
Pioneer, and
StagesOne.
The fundamental physics behind each of these three units is the same: to
propel the bike force is transmitted via a mechanical path: pedal body to
pedal spindle to crank arm to (left side only) bottom bracket spindle to
spider to chainring to chain to cassette to free hub body to spokes to rim
to tires to road.
You can in theory ... 阅读全帖 |
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i*********5
发帖数: 19210 | 46 http://www.bicycling.com/training-nutrition/training-fitness/bi
Cyclists are innovators, constantly hunting for an edge. Over the last half-
century, we've tried thousands of methods to become stronger, faster, and
smarter on a bike—many of which have been discarded through the years.
These have endured.
1. To corner, enter wide and exit wide.
2. Brake Less
It sounds counterintuitive, but the harder you yank on the brakes, the less
control you have over your bike. The best riders brake well befo... 阅读全帖 |
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M****m
发帖数: 3243 | 47 谢谢！还有个问题是需要调节变档器么？我在想要是3个ring变成两个了，要是在小的
那个chainring上不小心拨到了降档，是不是链条就掉了？ |
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t****u
发帖数: 10218 | 48 买SRAM的话，chainring和bottom bracket可以拆下来通用 |
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t****u
发帖数: 10218 | 50 不换链条，就是等着连chainring和cassette一起换。
打个比方，就像汽车不做oil change也没关系，大不了到时候换发动机就是了 :) |
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