T800 21mm IW Butterfly 38

Brand from China · 1 variant in the manufacturer’s shop

Dimensions to scale, shape schematic

Rim depth: 38 mm; Manufacturer’s claim

Source: xmcarbonspeed.cc · As of 22 Oct 2026

“The weights of the 38mm depth type: 1275g+/-25g”
Internal width: Internal width according to the shop: 21.4 mm.

Green: 23 mm internal width or more. Yellow: 21 to under 23 mm. Red: under 21 mm.; Manufacturer’s claim

Source: xmcarbonspeed.cc · As of 22 Oct 2026

“1,T800 Carbon 21.4mm internal width Disc Brake Road/Gravel Rim, 21/21 holes, butterfly finish”
External width: External width according to the shop: 28 mm, internal width 21.4 mm, so 6.6 mm wider outside than inside.

Rated is how much wider the rim is outside than inside. Green: at least 7 mm. Yellow: 5 to under 7 mm. Red: under 5 mm.; Manufacturer’s claim

Source: ueeshop.ly200-cdn.com · As of 22 Oct 2026

“Outer Width (Bild: Rim Depth 38mm; Rim internal / outter width 21.4mm / 28mm): 28mm”
Set weight: Expected at 38 mm depth and 21.4 mm internal width: 1,303 g. Stated: 1,275 g, manufacturer’s claim.

Expected from a robust regression over the manufacturer’s claims of 1,108 wheelsets by rim depth and internal width. With green load capacity: green up to 5% heavier than expected. Yellow: up to 12% heavier. Red: more than 12% heavier.

± 25 g; Manufacturer’s claim

Source: xmcarbonspeed.cc · As of 22 Oct 2026

“The weights of the 38mm depth type: 1275g+/-25g”

System limit according to the manufacturer: 135 kg (6, System weight limit: 135kg). The manufacturer states no max. rider weight.

Rated is the max. rider weight, without it the max. system weight (rider, bike and luggage); a limit without reference counts as system weight. Green: rider from 120 kg, system from 130 kg. Yellow: rider 100 to under 120 kg, system 110 to under 130 kg. Red: below. Grey: the manufacturer states no limit.
Duties and import VAT according to the shop: included, duties paid delivery (DDP).

Green: included, so duties paid delivery (DDP), or shipped from the EU. Yellow: you pay them on import, plus at least 19% import VAT, or only the taxes are included and the duties stay open. Grey: the shop does not say clearly.
Green: free to Germany. Yellow: paid. Grey: the shop does not say clearly.
Delivery time according to the shop: 7 to 20 days, so up to 15 business days.

The upper value counts, days count as business days × 5/7. Green: up to 10 business days. Yellow: 11 to 20 business days. Red: more than 20 business days.
Returns according to the shop: 14 days, you pay return shipping.

Green: 30 days or more if the shop pays return shipping. Yellow: any other period, including returns only for defects.
Wheelsets 3 years, individual carbon rims and carbon parts 2 years. Original owners only, from the date of purchase, keep the proof of purchase. Racing use and accidents are excluded.

Green: 3 years or more, or lifetime. Yellow: 2 years. Red: under 2 years.
15% discount on a replacement after a crash.

Green: the brand offers crash replacement, a discounted replacement after a crash. Red: it offers none. Grey: it does not say clearly.
Green: wheel bags and more accessories included. Yellow: accessories such as valves, spare spokes or rim tape included, but no wheel bags. Red: the package list names only the wheels. Grey: the shop does not name what is included.

Specifications

XMCS T800 21mm IW Butterfly 38, as claimed by the manufacturer: rim depth 38 mm, 21.4 mm internal width, 28 mm external width, 1,275 g per set.

The manufacturer gives no figures yet for spoke count and freehub mechanism.

Load capacity

Max. rider weight: unknown
Max. system weight: 135 kg

Manufacturer’s claim

Source: xmcarbonspeed.cc · As of 22 Oct 2026

“6, System weight limit: 135kg”
UCI approval: unknown

Spokes

Count F/R: unknown
Material: Carbon

Manufacturer’s claim

Source: xmcarbonspeed.cc · As of 22 Oct 2026

“4, Super light carbon spokes”
Model: unknown

Hub

Model: unknown
Freehub mechanism: unknown

In the box

Included: unknown

Buy from XMCS

XMCS

Brand from China · 54 wheelsets

Shipping to Germany: unclear
Duties and import VAT: included, duties paid delivery (DDP)
Delivery time: 7 to 20 days
Ships from: unclear
Returns: 14 days, you pay return shipping
Payment methods: PayPal
Warranty: 3 years
Crash replacement: yes
Warranty handling: unknown

This is what the shop’s pages say, for deliveries to Germany. Sources, details and contact are on the brand page.

All about XMCS All 54 wheelsets from XMCS in the list

Offers

€587 $659 in the shop 1 variant lowest price

Variant	Link to the shop
CS-RDW-38-28 · With access holes · Center Lock Straight Pull Front 12100/Rear 12142 TA · 54T · Shimano 11s	In the shop: CS-RDW-38-28 · With access holes · Center Lock Straight Pull Front 12100/Rear 12142 TA · 54T · Shimano 11s

Prices from the manufacturer’s shop, as of 22 Oct 2026. Whether shipping comes on top is unclear. Duties and import VAT are included (duties paid delivery, DDP). A final price with shipping and charges will follow.

Prices in € converted at €1 = $1.1234 as of 21 Oct 2026 (Source: ECB reference rates). The amount your bank charges can differ, depending on its rate and fees.

Similar wheelsets from other brands

Wheelset	Depth	Internal	Weight	Price from
XMCS T800 21mm IW Butterfly 38 this model	38 mm	21.4 mm	1,275 g	€587
Nepest NOVA 35	35 mm	23 mm	1,180 g −95 g	€1,362 +€775
Elitewheels Drive II 36	36 mm	23 mm	1,260 g −15 g	€1,157 +€570
UPVINE Ultra 40	40 mm	23 mm	950 g −325 g	€1,682 +€1,095
Carbonal Road DT Swiss 180 23mm Internal Width CLINCHER Wave W23-3235	33.5 mm	23 mm	1,250 g −25 g	€1,201 +€614

Selected by specs: rim depth ±5 mm, internal width ±2 mm, one model per brand. Order as in the list: rating points, on a tie the price, then the smaller deviation in depth and internal width. Price from as in the list, without shipping and import charges.

Sources

Product page xmcarbonspeed.cc retrieved 22 Oct 2026
Spec sheet as image ueeshop.ly200-cdn.com retrieved 22 Oct 2026