Questions tagged [shimano]

Shimano brand bicycle components. (No need to use if Shimano is an incidental part of the question.)

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32 views

How can I determine what postmount I need for my fork / rotor for front and back

I am planning to purchase Shimano Saint BL-M820 + BR-M820 hydraulic disc brake set for my Specialized Stumpjumper Comp and I have no idea what post-mount to buy since I changed my fork and I am pretty ...
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1answer
40 views

Carerra Hellcat - Front Derailleur issues - Possibly replace

I am new here and to cycling as an adult (last time I rode I was a teenager some 30 years ago). I have bought a second hand Hellcat and am having issues with the front derailleur (FD). It sort of ...
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1answer
71 views

Bottom bracket compatibility

After two LBS's, a blowtorch and a tyre shops impact driver I finally have my bottom bracket out. It an aluminium frame if that makes a difference. On the drive side some of the thread is gone, ...
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2answers
90 views

Customizing the smallest cog

I am running on a Shimano Tiagra 10 speed (CS-HG500-10) (12T-28T) and (50-34T front). I'd like to change the smallest cog (12T) to something smaller, i.e., 11 or even 10, to improve my sprints. Is ...
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1answer
110 views

Will an Shimano M8000 brake lever blade fit a M8100?

Will an Shimano M8000 brake lever blade fit a M8100? I broke my left blade, it's a Shimano XT M8100. I can only seem to find the replacement M8000 part. I don't want to replace the whole unit, seems ...
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1answer
43 views

Replace Vintage Shimano Trigger Shifter

I have a Cannondale M600 Red White & Blue. My 7 speed Shimano integrated trigger shifter will no longer function. I cannot tell the model I cannot fix it nor find an identical replacement what ...
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1answer
53 views

Why can't I adjust my Shimano Nexus 8 gear?

I have an three year old Electra Townie 8i with the Shimano Nexus Inter 8 hub gear that needs to be adjusted. I followed the guide in this clip and it was easy enough. ...
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1answer
107 views

Ultegra R8000 crank spacer

Does the Hollowtech II Ultegra R8000 crankset need to use spacers? I just converted my bike from Praxis to Shimano (finally I have the whole groupset!). I had to replace the BB and cranks (duh) for ...
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4answers
162 views

Is 160mm crank too short?

I’ve done some research about crank length. When I’m riding foooool gas my knee is starting to hurt but when I’m just chilling in group rides I feel alright. My crank length at the moment is 172.5 and ...
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4answers
480 views

General question about small transmission changes

I am trying to wrap my head around the benefit I may get out of small changes regarding my transmission ratio. Here is the premise: 11-42 cassette (Shimano M7000) 36-26 crankset (Shimano MT600) I ...
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1answer
62 views

Mechanical Ultegra's R8000 right-mech cable failure

On my Giant TCR Advanced SL I have mechanical ultegra R8000 groupset and every 7/8 thousands kilometers the cable constantly breaks(usually it should happens every 20 thousands kilometers). It ...
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Shimano SPD-SL Pedal Tension Adjustment not Clicking? Possible Counterfeit?

So when I read the manual, it says the 105 pedal I have (5800) will have a click when tightening or loosening the tension adjuster, supposedly 4 clicks for 360 degree rotation, however mine don't ...
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2answers
147 views

MTB 1x vs 2x cross chaining [duplicate]

I've got a good deal and bought a new bike with full Shimano XT groupset and 2x Drivetrain which I am not fully satisfied with, it has 34/24 and 11-42 setup. I would prefer 1x more but not going to ...
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257 views

Difference between Shimano GRX400 and SRAM Apex

I'm currently interested in a gravel bike and am in the process of mapping out my options. One parameter that is very obvious is that some models come with Shimano's GRX400 groupset and some with SRAM'...
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1answer
287 views

Why do some disk brake pads use split-pins or bolts to retain metallic or resin pads?

With Shimano disc brakes, there are two options for types of brake pads: resin or metallic. My understanding is that the metallic brakes generally have more stopping power while resin are more ...
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2answers
230 views

Chain slipping on brand new bike, bike shop is stumped

I just bought a 2020 Kona Lava Dome (the details of this bike/components are at the end of this question) and I can't use the low (small) front sprocket. Under any load (like a hill climb) the chain ...
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1answer
50 views

Threaded bleed port - 105 7020 shifter

In attempting to bleed my Shimano 105 hydraulic disc brakes, I seem to have threaded the bleed port so the screw no longer tightens. Screw is fine in the other shifter, and same issue when using screw ...
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3answers
164 views

Is my Shimano Deore SLX dérailleur a medium or long cage?

I have a Scott E-Genius 730 Plus and would like to replace the rear dérailleur (the probable cause of difficulties described in my last question). It's a Shimano Deore SLX Dyna-sys unit, it's for a 10-...
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2answers
155 views

Bottom jockey wheel on rear derailleur keeps skipping chain

Basically the angle between the bottom and top wheels is too great causing the chain to skip to the outside of the bottom wheel under force. If I use the higher adjustment screw on the shimano ...
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3answers
124 views

Do I need a spacer between my cassette and freehub?

I am fitting a modern Shimano 10-speed Hyperglide cassette (CS-HG81-10) to an old Shimano 8 speed hub (FH-M565). Fortunately, it is long enough (approx. 35mm) to take 10-speed. The hub came with a ...
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1answer
247 views

New Shimano 105 hydraulic brake loses pressure

I have a brand new bike with about only 25 miles on it. On a ride today the rear brake (Shimano 105 hydraulic) became spongy, letting me max out the lever but giving on about 25% of braking power. I ...
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1answer
44 views

Dura-Ace R9100 Bottom Bracket With A Dura-Ace FC-7900 Crankset?

I have just purchased a Dura-Ace FC-7900 crankset and I am trying to find a good, readily available bottom bracket to pair with it. With Shimano's Hollowtech II and Octalink II technologies, will the ...
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1answer
74 views

1x GRX chain sizing with 42T cassette

I'm trying to convert a bike to a Shimano GRX 1x setup using the following components: RD-RX812, CS-M8000 (11-42T), CN-HG701-11 (and FC-RX810-1, 42T). The problem I'm stuck at is when shifted to the ...
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1answer
54 views

Shimano 105 crankset

Been reading from posts and can’t find my answer. Any help would be appreciated. Scenario: I currently have a Felt AR5 10-speed with shimano 105 rear/front derailleur, 105 levers & brakes and a ...
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2answers
133 views

How to get rid of hub play in XTR FH-M975?

I recently bought a 2012 Santa Cruz Superlight 29, and there is some play in the rear wheel. The hub is an FH-M975 (XTR). With the wheel off, you can tell there's some play, but I guess there is ...
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1answer
45 views

Rear derailluer broken bolt

I am trying to figure out the right part to replace this bolt that broke. It went through the rear frame of bike into derailleur to a shimano dyna sys II unit. I believe it is a hanger bolt but the ...
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59 views

What is the difference between a Shimano 10-speed 2x front chainring and a 3x front chainring?

Shimano sells two types of 10-speed chainring, one for 2x and one for 3x systems. The smallest chainring have a 64mm BCD for both systems, and it looks the same to me. So what is the difference ...
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1answer
53 views

Broken Derailleur

I have the GT Palomar 2001 edition mountain bike and the derailleur broke last year. I am now looking to fix it but I do not know which one to get as i do not want to do anything to the chain. Please ...
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5answers
383 views

Switching from straight handle bar to drop down - which dual control lever would fit?

I am currently looking for ways to modify my bike. I do have a straight handlebar equipped and I‘d like to switch to a drop down road bike handlebar. My drivetrain is built mostly from Shimano SLX ...
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3answers
84 views

Can I mix these SRAM Apex components with Shimano/Ofmega components on my bike temporarily?

I own a Fausto Coppi vintage bike. Currently I have RSX shifters with Shimano exage 300EX front and rear derailleurs. I am switching my whole setup to accomodate 10 speed. My new wheels fit well. I ...
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1answer
48 views

Derailleur compatibility with Shimano 5500 shifters

Working on an old bike with a hodgepodge of groupset components - 5500 "105 flight deck" shifters (apparently 9 speed from what I've been able to work out online), a 3x Sora crankset, and a 9 speed ...
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2answers
87 views

Upgrading crankset to 48 tooth

I need to change my crankset and bottom bracket, is is possible to upgrade to 48 tooth from the stock 42? The front derailleur is shimano Alivo and has a clamp. It could be moved up to a higher ...
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2answers
262 views

Will this mix of Shimano 10 speed components work together?

My goal is to cobble together a 1x10 groupset using some Shimano 105 5700 shifters. From what I have read, I think that these components will work together, but I want to be sure before purchasing: ...
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1answer
227 views

Sprocket touching the biggest cog no matter B screw…how do I fix?

My Shimano rear derailleur was destroyed, for some reason got into the rear wheel, so I had to buy a new one. Hanger was a little misaligned but I think I fixed it. I bought the new derailleur, ...
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1answer
470 views

How to mount clipless pedals on a tandem?

My wife and I have recently purchased a vintage tandem, and are willing to switch to Shimano SPD pedals (M520). The problem is that there are 3 "chainring" sides on a tandem, 2 of which are located ...
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3answers
122 views

Have old bar end shifters which don't seem to fit in the new handlebars

I retrieved the Shimano bar end shifters from some old handlebars and now I want to fit the shifters to new bars. However strangely I can't fit the shifters in the new bars. See the following photo: ...
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1answer
53 views

My 6 geared Shimano bike doesn't shift from higher to lower gears but does the opposite smoothly

My 6 geared(Shimano gears) mountain bike with the grip shifting system shifts really smoothly from the 1st gear to the 6th (biggest cog to the smallest). However when I try to twist the shifter from ...
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2answers
378 views

Shimano GRX parts compatibility with XT or XTR FD on Salsa Fargo. (BSA73)

I am building a bike on Salsa Fargo TI 2019 frameset (ordered). It has BSA73 bottom bracket. My current plan for the 2x11 drivetrain looks like this: Crankset: Race Face Turbine 26/36 (Boost) Bottom ...
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4answers
338 views

Options for adding lower gearing for bike with Shimano 105 drivetrain

I have a 2015 Salsa Vaya 2 with a Shimano 105 drivetrain. It has a Shimano 105 Triple front derailleur with a 30/42/52t crankset. In the back it has an 11-30T 10-speed cassette (installed for me by ...
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0answers
68 views

Pulley alignment of Shimano derailleur

I noticed a misalignment between the two pulleys on a brand new Ultegra R8000 derailleur. It's less convincing on the photo than in real life, but still very much visible. I came across this ...
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2answers
236 views

What can I use to replace a Shimano Deore LX RD-M581?

I've got a trusty Marin East Peak XC from 2008, but the rear derailleur's adjustment screws have all sheared and I need to replace it. The derailleur is a Shimano Deore LX RD-M581, but I can't find ...
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2answers
596 views

Repair parts from Shimano - What are these part for?

I got a new Cannondale bike with hydraulic disc brakes and Tiagra set from Shimano. With the bike came seom parts which I cannot identify. I think they have to do with the brakes, but can't find ...
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22 views

Differences between Shimano DH-T670 and DH-3N72 dynamo hub?

Despite the cutouts in the hub flange, are there any differences? Different sealings or different races?
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1answer
70 views

How to get the fixed part of a bar-end shifter out of the handlebar when it is stuck?

I have a Shimano bar-end shifter where the fixed part is stuck in the handlebar. How can I get this part out in a way that I can reuse it in new handlebars? Note: I know that I have to loosen the ...
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3answers
631 views

Shorter crankset on road bike

I’ve been wondering what are the pros and cons of having a shorter crankset. I’m looking into changing my crank length to a 165mm. I currently have a Shimano FC-RS510 172.5mm upgrading to Shimano ...
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2answers
298 views

Lower gearing with 15 year old Shimano Ultegra

My wife adores her 15 year old Giant TCX Composite (size 44!). Arthritis means no getting out of the saddle for hills. We've got the standard 52/38 up front and a slightly larger 11/26 at the back. A ...
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1answer
160 views

Replacing Shimano FC175 TY301 crankset

Is the Shimano FC 175 TY301 crankset still available. If not, how do I choose a good replacement without changing anything else?
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3answers
207 views

How to measure and treat BSA bottom bracket housing misalignment?

I own an old Raleigh steel frame ('89) and wanted to install a cartridge bottom bracket (Shimano UN55). I noticed it was difficult to fit it in the housing. When installed, the square taper shaft ...
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1answer
58 views

On my Shimano FC-6800 right crank arm, is that a QR code imprinted on it?

On my Shimano FC-6800 right crank arm, is that a QR code imprinted on it? How is it used? When I scan it I get this: 68R4NL097388
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2answers
397 views

Triban RC 100 upgrade

I hope you're all safe. I'm looking to upgrade my Triban rc 100. It includes Shimano Touney groupset and Microshift x7 cassette. Currently, the groupset that attracts me the most is the Shimano Tiagra ...

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