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Shimano Alfine CT-S500 Chain Tensioner, Black

Gap30 Cycles
(68558)
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US $28.24
ApproximatelyAU $43.95
Condition:
New
10 available7 sold
Breathe easy. Free delivery and returns.
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Postage:
Free Standard Shipping.
Located in: Grand Rapids, Michigan, United States
Delivery:
Estimated between Wed, 6 Aug and Wed, 13 Aug to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the postage service selected, the seller's postage history, and other factors. Delivery times may vary, especially during peak periods.
Returns:
30-day returns. Seller pays for return postage.
Payments:
     Diners Club

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eBay item number:115798434554
Last updated on 13 Jul, 2025 06:23:22 AESTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
UPC
689228134409
Manufacturer Part Number
ICTS500L
MPN
ICTS500L
Manufacturer
Shimano
Brand
Shimano
Model
ICTS500L
Package Height
3.0
Part Type
Dingle-Speed Tensioners
Color
Black
Package Length
4.25
Package Width
4.25
Package Weight
0.6

Item description from the seller

About this seller

Gap30 Cycles

99.3% positive Feedback•244K items sold

Joined Nov 2013
ALL RIDERS. NO ATTITUDE. Gap30 Cycles is your source for quality cycling parts and accessories at great prices. 100% Customer Satisfaction Guaranteed.
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Detailed seller ratings

Average for the last 12 months
Accurate description
5.0
Reasonable postage costs
5.0
Postage speed
5.0
Communication
4.9

Seller feedback (76,117)

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    • z***g (279)- Feedback left by buyer.
      Past month
      Verified purchase
      brand new,
    • b***b (811)- Feedback left by buyer.
      Past month
      Verified purchase
      Fast shipping, great service! Thanks
    • b***s (1842)- Feedback left by buyer.
      More than a year ago
      Verified purchase
      Quick Shipment Item As Described Thank You AAA+++
    See all feedback

    Product ratings and reviews

    Learn more
    4.6
    23 product ratings
    • 19 users rated this 5 out of 5 stars
    • 1 users rated this 4 out of 5 stars
    • 2 users rated this 3 out of 5 stars
    • 0 users rated this 2 out of 5 stars
    • 1 users rated this 1 out of 5 stars

    Would recommend

    Good value

    Good quality

    Most relevant reviews

    See all 18 reviews
    • by cyclistguy
      30 May, 2019Top favourable review

      Good quality, keeps the chain taught on bumps, and goes well with the rest of the components.

      Going to a new drive train type is a bit unsettling. In choosing an internal gear rear cub, I considered just using the existing Ultegra derailleur and locking the shifter into the correct location. I knew there was probably a better way to allow the wheel to be removed for maintenance and such. This small and light-weight chain tensioner does the trick really well. I've only ridden it a couple of hundred miles so far, on a variety of pavement and packed dirt. It's doing its job just fine.

      Verified purchase: YesCondition: NewSold by: harmonicz_inc

    • by drjbob
      23 Oct, 2015Top critical review

      Don't Buy It!

      Put this on a Catrike Trail since I installed a Nuvinci N360 and kept the front derailleur and chainrings.. Spring promptly broke within minutes leaving the tensioner dangling and not enough tension in the chain to allow shifting from the 30t to the bigger ones. All work was done by an experienced mechanic at the LBS. Will just use the old rear derailleur as a tensioner. Stay away from it.

      Verified purchase: YesCondition: Pre-ownedSold by: k9dogs

    • by fa_bafbr_rv5nm6wed
      31 May, 2018

      Strong tensioner

      I have purchased 4 tensioners in the mission to make a single speed, 20" wheeled downhill ebike. The chain tensioner has been the hardest part. Long travel rear suspension would kick chains all the time. This Alfine tensioner has a very rigid spring, and keeps my chain on finally. Its not perfect, though. it has very little chain line adjustment, it is likely you will run into a problem with that, if you run your rear cog anywhere from the middle to the outside of the cartridge. This is for middle to inside of the cartridge. The cogs are plastic, not alloy. Otherwise its great!

      Verified purchase: YesCondition: NewSold by: mommy57467

    • by b-boyben
      14 Nov, 2021

      Make sure it's compatible

      Since there is no lateral adjustment on this it will only work for specific Shimano single speed hubs and is, unfortunately, not appropriate for most single speed conversions. It's a shame as it's a nice quality component. I don't know why manufacturers haven't noticed that there's a void/need for this that's currently only filled by a few very high end pieces of kit.

      Verified purchase: YesCondition: NewSold by: harmonicz_inc

    • by outsidediameter
      30 Jun, 2019

      Full suspension capable tensioner

      I really like this tensioner which seems to work for a Nexus 3 speed disc Hub really well. The chain line has stated is pretty far in but is workable with Shimano IGH hubs and single speed sprockets. Shimano specs a maximum 20t rear cog but I suspect a 22t would work. This dual pulley system can gather more chain than the Surly singleater (which is better for hardtails and has much more chainline adjustment) at the same time engaging more teeth on the sprocket

      Verified purchase: YesCondition: NewSold by: bikewagon

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