FSA ACB TH-871 replacement headset bearing for 1 1/8 inch steerer tubes with a 44mm cup diameter, a direct swap for the MR033, in stock in Kennington.
The FSA ACB TH-871 is a replacement headset bearing sized for 1 1/8 inch steerer tubes with a 44mm cup diameter, and it is a direct replacement for the MR033 bearing. Those two numbers, the steerer size and the 44mm cup diameter, are what decide whether it drops into your frame, so check them against the bearing you are taking out before ordering.
It is the part to reach for if your headset has gone creaky or notchy, or if you have the fork out for a rebuild and want fresh bearings and smooth steering again. FSA describe it as suited to general riding, commuting, touring and casual miles. We have it on the shelf at our Kennington shop for free click and collect, and our mechanics can press it in for you the same day.
Free same-day Click & Collect. Order online and collect from our London workshop, usually ready within a couple of hours. We will email you the moment it is ready.
Home delivery. Dispatched the same working day on orders placed before 3pm. Standard UK delivery is £2.99, free on orders over £75, tracked, and typically arrives in 2 to 3 working days.
Fitting while you wait. Buying a part you would rather not fit yourself? Our mechanics can fit most parts on the spot. Just ask when you collect.
30-day returns. Changed your mind? Return any unused item in its original packaging within 30 days for a full refund.
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