The SPANK 31.8 Split Stem was created to provide high strength with an ultra-low weight, ideal for trail and enduro applications. As part of our Human Factor Design initiative, the Split Stem features unique incremental sizing options so you can fully tune your ride. 33 / 38 mm lengths with a zero degree rise will allow you to dial in that perfect fit.
The Split Stem is shot-peened and anodized for maximum strength and additional durability over non-peened components.
- Highly weight optimized single crown stem, ideal for Trail & Enduro applications with 31.8mm handlebars
- Human Factor Design features micro increment size options, tuned to fit any rider size and style
- Human Factor cockpit setup index facilitates tuning of upsweep and backsweep
- Ultra-short stack height and true zero degree rise
- Chamfered barclamp to reduce stress risers and increase fatigue life in handlebars
- Forged 2-piece faceplate design reduces overall weight without compromising barclamp security or stiffness
- Shotpeen-anodized surface increases strength, durability, and fatigue life
KEY TECHNOLOGIES: Human Factor Design, MGR Alloy, Chamfered bar clamp, Custom Top-Cap included
MATERIAL: 6-Series Alloy, 3D forged CNC optimized body, 2D forged faceplate
LENGTH (mm): 33 / 38
RISE (°): 0
DIAMETER (mm): 31,8
STACK HEIGHT (mm): 34
WEIGHT (g): ±133 (33mm) / ±138 (38mm) ±140 (43mm) ±143 (48mm)
FINISH: Shotpeen anodized
The Gravity Cartel offers a simple 120 Day Return Policy. If you are not 100% satisfied with your purchase, you may return your web order from The Gravity Cartel for a full refund within 120 days from the date of purchase.
The returned items must be unworn, unused, and un-mounted in original packaging. An RMA # is required for all returned items.
To process a return with The Gravity Cartel simply email support@
Exchanges are simple with The Gravity Cartel. Simply return and repurchase your desired item. This ensures the item you would like in exchange is not sold while your return is in transit and gets you riding quicker.
Please note that International orders do not qualify for a refund of duties and taxes that may have been applied during the initial shipment of your order. The Gravity Cartel will apply a restocking fee and/or has the right to refuse any returned item(s) if used, worn, or mounted. A return will not be accepted without an RMA #.
It’s easy! Free Ground Shipping on all orders over $75 (before tax) to the USA. Orders received before 2pm M-F should ship same day. Sorry some restrictions do apply:
- We do not ship on Saturday or Sunday; however, your order will ship on the following business day.
- It is also important to note that shipping delays do occur and are out of our control.
- COVID19 Update: We are shipping all orders within 24 hours M-F, however our service providers (USPS, UPS, FEDEX, DHL) have temporarily suspended their Guaranteed Delivery Dates. All shipping times are estimates only at this time.
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate “DEHP”), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to